Solved

check radiobutton

Posted on 2001-07-18
3
268 Views
Last Modified: 2012-05-04
I would like to check if one of my radiobuttons is checked.
By default, NONE of the radio-buttons must be pre-checked
Problem: with my currently script, it checkes which value is checked, BUT if none of the radio buttons is checked, it gives automatically the value of the first radio button.

<radio name=a1 value=1>
<radio name=a1 value=2>
<radio name=a1 value=3>
<radio name=a1 value=4>
<radio name=a1 value=5>


function getSelectedButton(buttonGroup)
  {
  for (var i=0;i<buttonGroup.length;i++)
    {
    if (buttonGroup[i].checked)
     {
     return i
        }
    }
  return 0
  }

var i=getSelectedButton(document.form.a1)
alert("You chose "+ form.a1[i].value + ".")
0
Comment
Question by:moswa
3 Comments
 
LVL 22

Accepted Solution

by:
CJ_S earned 50 total points
ID: 6293168
function getSelectedButton(buttonGroup)
{
   for (var i=0;i<buttonGroup.length;i++)
   {
      if (buttonGroup[i].checked)
      {
         return i
      }
   }
   return -1;
}

var i=getSelectedButton(document.form.a1)
if(i<0) alert("No button checked")
else alert("You chose "+ form.a1[i].value + ".")
0
 
LVL 1

Author Comment

by:moswa
ID: 6293174
thanx,

moswa
0
 
LVL 30

Expert Comment

by:third
ID: 6293175
your function returns 0 :

function getSelectedButton(buttonGroup){
 for (var i=0;i<buttonGroup.length;i++){
   if (buttonGroup[i].checked) {
    return i
   }
 }

// this statement makes it zero
 return 0
}

u need to remove that part.... :^) third

0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Adding Row and Cell on a table 14 25
multiple selects 23 49
Autocomplete with Jquery Question 2 21
Validating Date 4 15
Today I would like to talk about localizing (Internationalization) JavaScript applications. Introduction When creating an application that is going to be used by many people around the globe, it is important to remember that not everyone speak…
This article discusses the difference between strict equality operator and equality operator in JavaScript. The Need: Because JavaScript performs an implicit type conversion when performing comparisons, we have to take this into account when wri…
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)
The viewer will learn the basics of jQuery including how to code hide show and toggles. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery…

821 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question