Question

urgent - limit # of clicks allowed on check box & radio buttons

Asked by: webdott

i have the following code that i need help reworking.

part 1
i want to only the user to only be able to click 3 check boxes or radio buttons.
but, if they change their mind, allow them to uncheck or unclick the radio button
and choose another answer.

part 2
i have other check  boxes and radio buttons that i do not want to effect the
the maximum of 3 clicks on the same page. i need to exclude these from the
maximum 3 click choice.

i hope you all can help.
here is my code:
<HTML>
 <HEAD>
 
  <TITLE>Untitled</TITLE>
  <SCRIPT TYPE="text/javascript">
      function checkChecked(obj)
      {
            var maxchecked = 3;
            var chkcount = 0;
            var els = obj.form.elements;
            for(var i=0; i<els.length; i++)
            {
                  if(els[i].tagName.toLowerCase() == 'input')
                  {
                        var typ = els[i].type.toLowerCase();
                        if((typ == 'checkbox' || typ =='radio'))
                        {
                              if(els[i].checked)
                              {
                                    chkcount++;
                              }
                              if(chkcount > maxchecked)
                              {
                                    obj.checked = false;
 alert('Sorry, you can select only ' + maxchecked + ' choices');
 break;
                              }
                        }
                  }
            }
      }
      </SCRIPT></HEAD>
 <BODY>
  <FORM NAME="myform">
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2">want only 3
    avaliable to click</FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2">[ must be able to
    unclick check box to make a new choice, but still limit to 3 checks ]</FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"><INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio1" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio1" ONCLICK="checkChecked(this);" /></FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"><INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio1" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio1" ONCLICK="checkChecked(this);" /></FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"><INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio1" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio1" ONCLICK="checkChecked(this);" /></FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2">do not want these
    to be limited</FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"><INPUT TYPE=CHECKBOX NAME=" "> <INPUT TYPE=CHECKBOX NAME=" "> <INPUT TYPE=CHECKBOX NAME=" "> <INPUT TYPE=CHECKBOX NAME=" "> <INPUT TYPE=CHECKBOX NAME=" "> <INPUT TYPE=CHECKBOX NAME=" "></FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"><!-- $MVD$:spaceretainer() --></FONT></FONT>&nbsp;</P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"><!-- $MVD$:spaceretainer() --></FONT></FONT>&nbsp;
   </FORM>
 </BODY>
</HTML>

thanks
mike

This Question has been solved and asker verified All Experts Exchange premium technology solutions are available to subscription members.

Subscribe now for full access to Experts Exchange and get

Instant Access to this Solution

  • Plus...
  • 30 Day FREE access, no risk, no obligation
  • Collaborate with the world's top tech experts
  • Unlimited access to our exclusive solution database
  • Never be left without tech help again

Subscribe Now

Asked On
2008-05-14 at 13:39:28ID23403060
Tags

javascript, cgi, html

Topics

JavaScript

,

Hypertext Markup Language (HTML)

,

Scripting Languages

Participating Experts
3
Points
500
Comments
12

Trusted by hundreds of thousands everyday for fast, accurate and reliable tech support.

  • "The time we save is the biggest benefit of Experts Exchange to Warner Bros. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange." Mike Kapnisakis, Warner Bros.
  • "Our team likes having a resource that is more secure than just using Google and most experts using this service really know their stuff. It's nice to look here first versus using Google." Dayna Sellner, Lockheed Martin
  • "Anytime that I've been stumped with a problem, 9 out of 10 times Experts Exchange has either the accepted solution or an open discussion of the potential solution to the problem." Kenny Red, eBay Inc.

See what Experts Exchange can do for you.

Got a question?

We've got the answer.

Experts Exchange has been collecting answers to technology questions since 1996…3 million and counting! If you have a question, chances are we already have your answer.

Screenshot of Experts Exchange Knowledgebase

Need individual assistance?

Our experts are ready to help.

If you can't find the exact answer you're looking for, ask our exclusive community of 50,000 experts. You’ll get a personalized answer from a trusted professional.

Screenshot of Experts Exchange Knowledgebase

Want to learn from the best?

Read articles from industry experts.

Thousands of free tech tips, tricks, how-to’s and tutorials are available in our peer reviewed articles section. See for yourself how smart our experts are, no login required.

Screenshot of an Article

Working on a long term project?

Store your work and research.

Save solutions to your questions, answers you’ve discovered through searching plus helpful articles in your personal knowledgebase for easy future access.

Screenshot of Experts Exchange Knowledgebase

Access the answers to your technology questions today.

Subscribe Now

30-day free trial. Register in 60 seconds.

What Makes Experts Exchange Unique?

Members of the expert community talk about why the experience at Experts Exchange is different than what you will find anywhere else.

Trusted by the world's most respected brands.

image of each brand's logo

Faithfully serving IT professionals since 1996.

Experts Exchange Logo

Try it out and discover for yourself.

Subscribe Now

30-day free trial. Register in 60 seconds.

Related Solutions

  1. helvetica font PLEASE
    I've tried to find Helvetica Font Face everywhere..........any help??? THANKS! mickeymouser
  2. Helvetica
    I need to install Helvetica onto my PC. Where do I find it to download. Not talking about Helv-Condensed.
  3. Helvetica Font
    Where can I get the Helvetica Font for use in MS Word 97?
  4. Need Helvetica
    Anybody knows where I can get Helvetica free?
  5. Arial font and CSS
    For some reason i can't get my CSS design to display the arial font. The CSS is set: font-family:Arial, Helvetica, sans-serif; Yet the font isn't arial. I have also tried font-family:Arial; How can i force it to display Arial?

Free Tech Articles

  1. WARNING: 5 Reasons why you should NEVER fix a computer for free.
    It is in our nature to love the puzzle. We are obsessed. The lot of us. We love puzzles. We love the challenge. We thrive on finding the answer. We hate disarray. It bothers us deep in our soul. W...
  2. SCCM OSD Basic troubleshooting
    SCCM 2007 OSD is a fantastic way to deploy operating systems, however, like most things SCCM issues can sometimes be difficult to resolve due to the sheer volume of logs to sift through and the dispe...
  3. Migrate Small Business Server 2003 to Exchange 2010 and Windows 2008 R2
    This guide is intended to provide step by step instructions on how to migrate from Small Business Server 2003 to Windows 2008 R2 with Exchange 2010. For this migration to work you will need the fo...
  4. Create a Win7 Gadget
    This article shows you how to create a simple "Gadget" -- a sort of mini-application supported by Windows 7 and Vista. Gadgets can be dropped anywhere on the desktop to provide instant information, ...
  5. Outlook continually prompting for username and password
    There have been a lot of questions recently regarding Outlook prompting for a username and password whilst using Exchange 2007. There are a few reasons why this would happen and I will try to cover t...
  6. Backup Exchange 2010 Information Store using Windows Backup
    There seems to be quite a lot of confusion around the ability to backup Exchange 2010 using the built in Windows Backup feature. This stems from the omission of this feature prior to Exchange 2007 s...

Cloud Class Webinars

  1. Avoiding Bugs in Microsoft Access
    Alison Balter takes and in-depth look at avoiding bugs in Access. In this webinar you will learn about using the immediate window to debug your applications, invoking the debugger, using breakpoints to troubleshoot, stepping through code, setting the next statement to execute, ...
  2. Top 10 Best New Features in Visio 2010
    Scott Helmers gives live demonstrations of the top 10 new features in Visio 2010. This webinar will teach you how to create compelling diagrams by adding shapes to the page with a single click, linking the shapes in a diagram to data in Excel (or SQL Server, or SharePoint), ...
  3. IT Consultant Business Secrets Revealed
    Michael Munger, Experts Exchange tech pro and IT consultant, pulls back the curtain on his very successful businesses and answers question on every IT consultant and business owner should know about. He shares secrets on what he did to solve the 5 most common problems in IT, ...
  4. Disaster Recovery and Business Continuity
    Quest CTO, Mike Billon, gives an overview of the steps involved in building a dunamic disaster recovery plan. Through case studies and an examination of software/hardware tooles for monitoring and testing, you'll gain a better understandin of where you are, where you want ...
  5. Organize Your Visio Diagrams with Containers and Lists
    Scott Helmers uses cross functional flowcharts, wireframe diagrams, data graphic legends and seating charts to teach you: how to ustilize all three new structured diagram components in Visio 2010, the best practices for organizeing shapes in previous version of Visio, how to organize ...
  6. How to Us Objects, Properties, Events and Methods in Microsoft Access
    Alison Dalter gives an in-depbth look at objects, properties, events and methods in Microsoft Access. In this webinar you will learn about using the object browser, referring to objects, working with properties and methods, working with object variables, understanding the ...

Join the Community

Give a Little. Get a Lot.

Join the community of experts here and help other tech pros by answering question in your area of expertise. You can earn FREE access to all Experts Exchange's premium features and resources.

Join the Community

Answers

 

by: TNamePosted on 2008-05-14 at 13:51:36ID: 21568566

You should have these 2 lines outside of the function:

var chkcount = 0;
var maxchecked = 3;

(especially "var chkcount = 0;" otherwise the count will start from zero every time you click and you'll never reach 3...)

Also, you could give all checkboxes/radiobutons that you want to include the same name and then say:

var els = document.getElementsByName('theName');

 

by: TNamePosted on 2008-05-14 at 13:52:43ID: 21568576

>You should have these 2 lines outside of the function:

Sorry, forget this, I misread what you are doing... ;)

 

by: hieloPosted on 2008-05-14 at 13:57:51ID: 21568625

You can "group" your checkboxes by giving them a class and pass that class to your function. Then limit will be based on that "common class". The checkboxes seem to be working. The radio buttons I didn't bother because I don't understand how you are "grouping" them, the idea is the same (in terms of the class)

<HTML>
 <HEAD>
  
  <TITLE>Untitled</TITLE>
  <SCRIPT TYPE="text/javascript">
      function checkChecked(obj,group)
      {
            var maxchecked = 3;
            var chkcount = 0;
            var els = obj.form.elements;
            for(var i=0; i<els.length; i++)
            {
                  if(group && els[i].className==group && els[i].checked && els[i].tagName.toLowerCase() == 'input')
                  {
                        var typ = els[i].type.toLowerCase();
                        if((typ == 'checkbox' || typ =='radio'))
                        {
                              if(els[i].checked)
                              {
                                    chkcount++;
                              }
                              if(chkcount > maxchecked)
                              {
                                   obj.checked = false;
							alert('Sorry, you can select only ' + maxchecked + ' choices');
							break;
                              }
                        }
                  }
            }
      }
      </SCRIPT></HEAD>
 <BODY>
  <FORM NAME="myform">
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2">want only 3 
    avaliable to click</FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2">[ must be able to 
    unclick check box to make a new choice, but still limit to 3 checks ]</FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"><INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" class="limit"/> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" class="limit" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" class="limit" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" class="limit" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" class="limit" /> <INPUT TYPE=RADIO NAME="myradio" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio1" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio1" ONCLICK="checkChecked(this);" /></FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"><INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio1" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio1" ONCLICK="checkChecked(this);" /></FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"><INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio1" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio1" ONCLICK="checkChecked(this);" /></FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2">do not want these 
    to be limited</FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"><INPUT TYPE=CHECKBOX NAME=" "> <INPUT TYPE=CHECKBOX NAME=" "> <INPUT TYPE=CHECKBOX NAME=" "> <INPUT TYPE=CHECKBOX NAME=" "> <INPUT TYPE=CHECKBOX NAME=" "> <INPUT TYPE=CHECKBOX NAME=" "></FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"><!-- $MVD$:spaceretainer() --></FONT></FONT> </P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"><!-- $MVD$:spaceretainer() --></FONT></FONT> 
   </FORM>
 </BODY>
</HTML>

                                              
1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:
33:
34:
35:
36:
37:
38:
39:
40:
41:
42:
43:
44:
45:
46:
47:
48:
49:
50:
51:
52:
53:
54:
55:
56:
57:
58:

Select allOpen in new window

 

by: HonorGodPosted on 2008-05-14 at 14:13:49ID: 21568788

And remember, that only one radio button within a group (i.e., with the same name attribute) can be selected at a time.

 

by: HonorGodPosted on 2008-05-14 at 14:14:32ID: 21568794

oh, and use CSS for your font selection...

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title> limited CheckBoxes </title>
<style type='text/css'>
  .myclass {
    font-family : Arial,Helvetica,Monaco;
    font-size   : 1em;
  }
</style>
<script type='text/javascript'>
  function checkChecked( obj ) {
    var maxchecked = 3;
    var chkcount = 0;
    var els = obj.getElementsByTagName( 'INPUT' );
    for( var i = 0; i < els.length; i++ ) {
      var typ = els[ i ].type.toLowerCase();
      if ( typ == 'checkbox' ) {
        if ( els[ i ].checked ) {
          chkcount++;
        }
        if ( chkcount > maxchecked ) {
          obj.checked = false;
          alert('Sorry, you can select only ' + maxchecked + ' choices');
          break;
        }
      }
    }
  }
</script>
</head>
<body>
  <form name='myform' class='myclass'>
   <p>want only 3 avaliable to click</p>
   <p>[ must be able to unclick check box to make a new choice, but still limit to 3 checks ]</p>
   <p>
     <input type='checkbox' onClick="checkChecked(this);" />
     <input type='checkbox' onClick="checkChecked(this);" />
     <input type='checkbox' onClick="checkChecked(this);" />
     <input type='checkbox' onClick="checkChecked(this);" />
     <input type='checkbox' onClick="checkChecked(this);" />
     <input type='radio'    name="myradio" onClick="checkChecked(this);" />
     <input type='radio'    name="myradio" onClick="checkChecked(this);" />
     <input type='radio'    name="myradio1" onClick="checkChecked(this);" />
     <input type='radio'    name="myradio1" onClick="checkChecked(this);" />
   </p>
   <p>
     <input type='checkbox' onClick="checkChecked(this);" />
     <input type='checkbox' onClick="checkChecked(this);" />
     <input type='checkbox' onClick="checkChecked(this);" />
     <input type='checkbox' onClick="checkChecked(this);" />
     <input type='checkbox' onClick="checkChecked(this);" />
     <input type='radio'    name="myradio" onClick="checkChecked(this);" />
     <input type='radio'    name="myradio" onClick="checkChecked(this);" />
     <input type='radio'    name="myradio1" onClick="checkChecked(this);" />
     <input type='radio'    name="myradio1" onClick="checkChecked(this);" />
   </p>
   <p>
     <input type='checkbox' onClick="checkChecked(this);" />
     <input type='checkbox' onClick="checkChecked(this);" />
     <input type='checkbox' onClick="checkChecked(this);" />
     <input type='checkbox' onClick="checkChecked(this);" />
     <input type='checkbox' onClick="checkChecked(this);" />
     <input type='radio'    name="myradio" onClick="checkChecked(this);" />
     <input type='radio'    name="myradio" onClick="checkChecked(this);" />
     <input type='radio'    name="myradio1" onClick="checkChecked(this);" />
     <input type='radio'    name="myradio1" onClick="checkChecked(this);" />
   </p>
   <p>
     do not want these to be limited
   </p>
   <p>
     <input type='checkbox' name=" ">
     <input type='checkbox' name=" ">
     <input type='checkbox' name=" ">
     <input type='checkbox' name=" ">
     <input type='checkbox' name=" ">
     <input type='checkbox' name=" ">
   </p>
   <p>
     <!-- $MVD$:spaceretainer() -->
   </p>
   <p>
     <!-- $MVD$:spaceretainer() -->
     &nbsp;
   </p>
   </form>
 </body>
</html>

                                              
1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:
33:
34:
35:
36:
37:
38:
39:
40:
41:
42:
43:
44:
45:
46:
47:
48:
49:
50:
51:
52:
53:
54:
55:
56:
57:
58:
59:
60:
61:
62:
63:
64:
65:
66:
67:
68:
69:
70:
71:
72:
73:
74:
75:
76:
77:
78:
79:
80:
81:
82:
83:
84:
85:
86:
87:
88:
89:

Select allOpen in new window

 

by: webdottPosted on 2008-05-14 at 14:18:18ID: 21568832

hielo,

i copied the exact same to the radio buttons, they work fine.

i changed the name to .classNAME1 for another set of boxes, but that did not work.
how do i change the name of the class?
i see how you have the onclick = checkChecked(this,this.className)

thanks again

 

by: hieloPosted on 2008-05-14 at 14:22:58ID: 21568862

The code below imposes the restriction on the 15 checkboxes on top. As for the radio buttons, it already allows a max of 2 due to the names. You can only select one radio button from a group of radio buttons with the same name.

<HTML>
 <HEAD>
  
  <TITLE>Untitled</TITLE>
  <SCRIPT TYPE="text/javascript">
      function checkChecked(obj,group)
      {
            var maxchecked = 3;
            var chkcount = 0;
            var els = obj.form.elements;
            for(var i=0; i<els.length; i++)
            {
                  if(group && els[i].className==group && els[i].checked && els[i].tagName.toLowerCase() == 'input')
                  {
                        var typ = els[i].type.toLowerCase();
                        if((typ == 'checkbox' || typ =='radio'))
                        {
                              if(els[i].checked)
                              {
                                    chkcount++;
                              }
                              if(chkcount > maxchecked)
                              {
                                   obj.checked = false;
							alert('Sorry, you can select only ' + maxchecked + ' choices');
							break;
                              }
                        }
                  }
            }
      }
      </SCRIPT></HEAD>
 <BODY>
  <FORM NAME="myform">
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2">want only 3 
    avaliable to click</FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2">[ must be able to 
    unclick check box to make a new choice, but still limit to 3 checks ]</FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2">
    <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" class="limit"/> 
    <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" class="limit" /> 
    <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" class="limit" /> 
    <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" class="limit" /> 
    <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" class="limit" /> 
    <INPUT TYPE=RADIO NAME="myradio" ONCLICK="checkChecked(this);" /> 
    <INPUT TYPE=RADIO NAME="myradio" ONCLICK="checkChecked(this);" /> 
    <INPUT TYPE=RADIO NAME="myradio1" ONCLICK="checkChecked(this);" /> 
    <INPUT TYPE=RADIO NAME="myradio1" ONCLICK="checkChecked(this);" /></FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"><INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" class="limit"/> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" class="limit"/> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" class="limit"/> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" class="limit"/> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" class="limit"/> <INPUT TYPE=RADIO NAME="myradio" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio1" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio1" ONCLICK="checkChecked(this);" /></FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"><INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" class="limit"/> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" class="limit"/> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" class="limit"/> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" class="limit"/> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" class="limit"/> <INPUT TYPE=RADIO NAME="myradio" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio1" ONCLICK="checkChecked(this);" /> <INPUT TYPE=RADIO NAME="myradio1" ONCLICK="checkChecked(this);" /></FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2">do not want these 
    to be limited</FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"><INPUT TYPE=CHECKBOX NAME=" "> <INPUT TYPE=CHECKBOX NAME=" "> <INPUT TYPE=CHECKBOX NAME=" "> <INPUT TYPE=CHECKBOX NAME=" "> <INPUT TYPE=CHECKBOX NAME=" "> <INPUT TYPE=CHECKBOX NAME=" "></FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"><!-- $MVD$:spaceretainer() --></FONT></FONT> </P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"><!-- $MVD$:spaceretainer() --></FONT></FONT> 
   </FORM>
 </BODY>
</HTML>

                                              
1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:
33:
34:
35:
36:
37:
38:
39:
40:
41:
42:
43:
44:
45:
46:
47:
48:
49:
50:
51:
52:
53:
54:
55:
56:
57:
58:
59:
60:
61:
62:
63:
64:
65:
66:
67:

Select allOpen in new window

 

by: HonorGodPosted on 2008-05-14 at 14:33:33ID: 21568936

You could use the fact that a group is named, and disable the remainder of the group when the limit is reached...  Something like this perhaps

  function checkChecked( obj ) {
    var maxchecked = 3;
    var grpName = obj.name;
    if ( grpName ) {
      var els = document.getElementsByName( grpName  );
      var checked = 0;
      for ( var i = 0; i < els.length; i++ ) {
        if ( els[ i ].checked ) {
          checked++;
        }
      }
      for ( var i = 0; i < els.length; i++ ) {
        if ( checked >= maxchecked )  {
          if ( els[ i ].checked ) {
            els[ i ].removeAttribute( 'disabled' );
          } else {
            els[ i ].disabled = 'disabled';
          }
        } else {
          els[ i ].removeAttribute( 'disabled' );
        }
      }
    }
  }

                                              
1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:

Select allOpen in new window

 

by: webdottPosted on 2008-05-14 at 14:53:59ID: 21569066

hielo

this is what i was trying to say in my past post.
i know that the radio buttons have to be grouped seperate
this is my code with your class.NAME that i modified the buttons

<SCRIPT TYPE="text/javascript">
      function checkChecked(obj,group)
      {
            var maxchecked = 3;
            var chkcount = 0;
            var els = obj.form.elements;
            for(var i=0; i<els.length; i++)
            {
                  if(group && els[i].className==group && els[i].checked && els[i].tagName.toLowerCase() == 'input')
                  {
                        var typ = els[i].type.toLowerCase();
                        if((typ == 'checkbox' || typ =='radio'))
                        {
                              if(els[i].checked)
                              {
                                    chkcount++;
                              }
                              if(chkcount > maxchecked)
                              {
                                   obj.checked = false;
alert('Sorry, you can select only ' + maxchecked + ' choices');
break;
                              }
                        }
                  }
            }
      }
      </SCRIPT></HEAD>
 <BODY>
  <FORM NAME="myform">
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2">want only 3
    avaliable to click</FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2">[ must be able to
    unclick check box to make a new choice, but still limit to 3 checks ]</FONT></FONT></P>
   <P>
    question # 1</P>
   <P>
    <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" CLASS="limit" /><FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" CLASS="limit" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" CLASS="limit" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" CLASS="limit" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" CLASS="limit" /> <INPUT TYPE=RADIO NAME="myradio" CLASS="limit" ONCLICK="checkChecked(this,this.className);" /><INPUT TYPE=RADIO NAME="myradio" CLASS="limit" ONCLICK="checkChecked(this,this.className);" /><INPUT TYPE=RADIO NAME="myradio" CLASS="limit" ONCLICK="checkChecked(this,this.className);" /><INPUT TYPE=RADIO NAME="myradio" CLASS="limit" ONCLICK="checkChecked(this,this.className);" /></FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2">question # 2</FONT></FONT></P>
   <P>
    <INPUT TYPE=CHECKBOX NAME=" " ONCLICK="checkChecked(this,this.className1);" CLASS="limit" /><FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"> </FONT></FONT><INPUT TYPE=CHECKBOX NAME=" " ONCLICK="checkChecked(this,this.className1);" CLASS="limit" /><FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"> </FONT></FONT><INPUT TYPE=CHECKBOX NAME=" " ONCLICK="checkChecked(this,this.className1);" CLASS="limit" /><FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"> </FONT></FONT><INPUT TYPE=CHECKBOX NAME=" " ONCLICK="checkChecked(this,this.className1);" CLASS="limit" /><FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"> </FONT></FONT><INPUT TYPE=CHECKBOX NAME=" " ONCLICK="checkChecked(this,this.className1);" CLASS="limit" /><FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"> <INPUT TYPE=RADIO NAME="myradio2" CLASS="limit" ONCLICK="checkChecked(this,this.className1);" /><INPUT TYPE=RADIO NAME="myradio2" CLASS="limit" ONCLICK="checkChecked(this,this.className1);" /><INPUT TYPE=RADIO NAME="myradio2" CLASS="limit" ONCLICK="checkChecked(this,this.className1);" /><INPUT TYPE=RADIO NAME="myradio2" CLASS="limit" ONCLICK="checkChecked(this,this.className1);" /></FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"><!-- $MVD$:spaceretainer() --></FONT></FONT>&nbsp;</P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2">do not want these
    to be limited</FONT></FONT></P>
   <P>
    <INPUT TYPE=CHECKBOX NAME=" "><FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"> <INPUT TYPE=CHECKBOX NAME=" "> <INPUT TYPE=CHECKBOX NAME=" "> <INPUT TYPE=CHECKBOX NAME=" "> <INPUT TYPE=CHECKBOX NAME=" "> <INPUT TYPE=CHECKBOX NAME=" "></FONT></FONT></P>
     </FORM>
 </BODY>
</HTML>

if i have 2 or more questions and i want just 3 possible answers to each question,
how do i name each class.NAME seperate?

HONORGOD:

can you give me the whole code with the buttons as per you last selection?

 

by: hieloPosted on 2008-05-14 at 15:05:47ID: 21569117

>>If i have 2 or more questions and i want just 3 possible answers to each question, how do i name each class.NAME seperate?
You give each question's checkbox group it's own classname. So for all of q1 checkboxes you would add class="q1", for all of q2 checkboxes you can use class="q2" etc. I used a class because YOU did not name your checkboxes, but if you were to give all of q1 checkboxes the same name => name="q1", then you will NOT need the class and instead of checkChecked(this,this.className); you can use checkChecked(this,this.name);

BTW: when posting code, click on Attach Code Snippet and place it there.

<SCRIPT TYPE="text/javascript">
      function checkChecked(obj,group)
      {
            var maxchecked = 3;
            var chkcount = 0;
            var els = obj.form.elements;
            for(var i=0; i<els.length; i++)
            {
                  if(group && els[i].type.toLowerCase()=="checkbox" && els[i].className==group && els[i].checked && els[i].tagName.toLowerCase() == 'input')
                  {
                        var typ = els[i].type.toLowerCase();
                        if((typ == 'checkbox' || typ =='radio'))
                        {
                              if(els[i].checked)
                              {
                                    chkcount++;
                              }
                              if(chkcount > maxchecked)
                              {
                                   obj.checked = false;
alert('Sorry, you can select only ' + maxchecked + ' choices');
break;
                              }
                        }
                  }
            }
      }
      </SCRIPT></HEAD>
 <BODY>
  <FORM NAME="myform">
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2">want only 3 
    avaliable to click</FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2">[ must be able to 
    unclick check box to make a new choice, but still limit to 3 checks ]</FONT></FONT></P>
   <P>
    question # 1</P>
   <P>
    <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" CLASS="q1" /><FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" CLASS="q1" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" CLASS="q1" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" CLASS="q1" /> <INPUT TYPE=CHECKBOX ONCLICK="checkChecked(this,this.className);" CLASS="q1" /> 
    <INPUT TYPE=RADIO NAME="myradio" CLASS="q1" ONCLICK="/*checkChecked(this,this.className)*/;" /><INPUT TYPE=RADIO NAME="myradio" CLASS="q1" ONCLICK="/*checkChecked(this,this.className)*/;" /><INPUT TYPE=RADIO NAME="myradio" CLASS="q1" ONCLICK="/*checkChecked(this,this.className)*/;" /><INPUT TYPE=RADIO NAME="myradio" CLASS="q1" ONCLICK="/*checkChecked(this,this.className)*/;" /></FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2">question # 2</FONT></FONT></P>
   <P>
    <INPUT TYPE=CHECKBOX NAME=" " ONCLICK="checkChecked(this,this.className);" CLASS="q2" /><FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"> </FONT></FONT><INPUT TYPE=CHECKBOX NAME=" " ONCLICK="checkChecked(this,this.className);" CLASS="q2" /><FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"> </FONT></FONT><INPUT TYPE=CHECKBOX NAME=" " ONCLICK="checkChecked(this,this.className);" CLASS="q2" /><FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"> </FONT></FONT><INPUT TYPE=CHECKBOX NAME=" " ONCLICK="checkChecked(this,this.className);" CLASS="q2" /><FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"> </FONT></FONT><INPUT TYPE=CHECKBOX NAME=" " ONCLICK="checkChecked(this,this.className);" CLASS="q2" /><FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"> 
    <INPUT TYPE=RADIO NAME="myradio2" CLASS="q2" ONCLICK="/*checkChecked(this,this.className)*/;" /><INPUT TYPE=RADIO NAME="myradio2" CLASS="q2" ONCLICK="/*checkChecked(this,this.className)*/;" /><INPUT TYPE=RADIO NAME="myradio2" CLASS="q2" ONCLICK="/*checkChecked(this,this.className)*/;" /><INPUT TYPE=RADIO NAME="myradio2" CLASS="q2" ONCLICK="/*checkChecked(this,this.className)*/;" /></FONT></FONT></P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"><!-- $MVD$:spaceretainer() --></FONT></FONT>&nbsp;</P>
   <P>
    <FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2">do not want these 
    to be limited</FONT></FONT></P>
   <P>
    <INPUT TYPE=CHECKBOX NAME=" "><FONT FACE="Arial,Helvetica,Monaco"><FONT SIZE="2"> <INPUT TYPE=CHECKBOX NAME=" "> <INPUT TYPE=CHECKBOX NAME=" "> <INPUT TYPE=CHECKBOX NAME=" "> <INPUT TYPE=CHECKBOX NAME=" "> <INPUT TYPE=CHECKBOX NAME=" "></FONT></FONT></P>
     </FORM>
 </BODY>
</HTML>

                                              
1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:
33:
34:
35:
36:
37:
38:
39:
40:
41:
42:
43:
44:
45:
46:
47:
48:
49:
50:
51:
52:
53:
54:
55:
56:

Select allOpen in new window

 

by: webdottPosted on 2008-05-14 at 18:48:45ID: 31458025

thanks again hielo

20120131-EE-VQP-002

3 Ways to Join

30-Day Free Trial

The Experts

98% positive feedback on 31,087 answers since March 2000. angeliii is a Microsoft Most Valuable Professional for his work with MS SQL Server & Develoment.

He has also proven his knowledge of Visual Basic Programming, PHP Scripting and Oracle Databases.

The Experts

97% positive feedback on 10,752 answers since July 2000. lrmoore has more than 18 years experience in the networking industry.

The six-time Mircosoft MVPs specialties include firewalls, virtual private networking, and network management.

Testimonials

"...and excellent source for support... Kind of like having your very own IT dept." Electriciansnet

Testimonials

"I was apprehensive at signing up at first. However... it has already made my life as an IT administrator much easier." JaCrews

Testimonials

"WOW! You guys have great, active, and knowledgeable people on here." moore50

Business Clients

Business Clients

In the Press

"If you’ve got a question... Experts Exchange can supply an answer.”

In the Press

"...an invaluable aid for both IT professionals and those who require tech support."

In the Press

"where IT professionals provide quick answers on just about any topic"

Business Account Plans

Loading Advertisement...