Solved

Onchange and Onblur clear textarea boxes

Posted on 2006-07-07
4
718 Views
Last Modified: 2008-03-17
I need help on coding a javascript.

Within my form is 4 textfields and 16 textarea boxes beneath it.. The 16 textarea boxes are laid out into 4 goups with 4 textarea's in each group.

Here is suedo code of what I need it to do.

if onblur || onchange textfield 2 = "" { clear all boxes in goup 2 }
if onblur || onchange textfield 3 = "" { clear all boxes in goup 3 }
if onblur || onchange textfield 4 = "" { clear all boxes in goup 4 }

So for example, when someone clears textfield 2 then all four textareas in group 2 get cleared as well.
0
Comment
Question by:ray-solomon
  • 2
4 Comments
 
LVL 63

Expert Comment

by:Zvonko
ID: 17061314
Like this:
<script>
function checkBlock(theField){
  if(theField.value==""){
    var theForm = theField.form;
    var ta = arguments;
    for(var i=1;i<ta.length;i++){
       theForm[ta[o]].value="";
    }
  }
}
</script>


And you call it like this:
<input type=text name="textfieldA" onChange="checkBlock(this,'textareaA1','textareaA2','textareaA3','textareaA4')" onBlur="this.onchange()">



0
 
LVL 63

Accepted Solution

by:
Zvonko earned 500 total points
ID: 17061374
Sorry, the loop var is "i" not "o":

<script>
function checkBlock(theField){
  if(theField.value==""){
    var theForm = theField.form;
    var ta = arguments;
    for(var i=1;i<ta.length;i++){
       theForm[ta[i]].value="";
    }
  }
}
</script>

0
 
LVL 10

Expert Comment

by:0h4crying0utloud
ID: 17061594


Here's another way using class names:


<input class="group1" type="text"><br>
<input class="group1" type="text"><br>
<input class="group1" type="text"><br>
X <input  type="text" onblur="if(this.value == ''){clearGroup('group1');}"><br>
<br><br><br>

<input class="group2" type="text"><br>
<input class="group2" type="text"><br>
<input class="group2" type="text"><br>
X <input  type="text" onchange="if(this.value==''){clearGroup('group2');}"><br>

<script>

function clearGroup(groupName) {
  var fieldGroup = document.getElementsByTagName("input");
  for (var i=0; i<fieldGroup.length; i++) {
        if (fieldGroup[i].className == groupName) {
              fieldGroup[i].value = "";
        }
      }
}

</script>
0
 
LVL 10

Author Comment

by:ray-solomon
ID: 17062106
That was exactly what I needed. Thanks Zvonko!
0

Featured Post

How your wiki can always stay up-to-date

Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
- Increase transparency
- Onboard new hires faster
- Access from mobile/offline

Join & Write a Comment

JavaScript can be used in a browser to change parts of a webpage dynamically. It begins with the following pattern: If condition W is true, do thing X to target Y after event Z. Below are some tips and tricks to help you get started with JavaScript …
This article demonstrates how to create a simple responsive confirmation dialog with Ok and Cancel buttons using HTML, CSS, jQuery and Promises
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…

708 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

Need Help in Real-Time?

Connect with top rated Experts

13 Experts available now in Live!

Get 1:1 Help Now