Question

How to select/toggle multiple checkboxes using Jquery

Asked by: Pdesignz

Hello,

I am new to javascript and jquery, but would like to have this done in jquery. I have one main checkbox and 4 sub checkboxes. What I would like is upon selecting the main checkbox this would then select/toggle the check in the the other 4 checkboxes. If main checkbox is unchecked then check is removed from other 4 checkboxed as well. Any code or examples that can be provided so that I can follow, would be much appreciated...

Thanks

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Asked On
2009-08-07 at 11:09:12ID24635563
Topics

Jquery

,

JavaScript

,

Asynchronous Javascript and XML (AJAX)

Participating Experts
2
Points
500
Comments
16

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Answers

 

by: cxrPosted on 2009-08-07 at 11:23:26ID: 25045579

Try this:

<html>
<head>
  <title>jQuery checkboxes</title>
  <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
</head>
<body>
 
<form>
<input type="checkbox" class="boxes" name="box_a" value="a" />
<input type="checkbox" class="boxes" name="box_b" value="b" />
<input type="checkbox" class="boxes" name="box_c" value="c" />
<input type="checkbox" class="boxes" name="box_d" value="d" />
<br />
Check all:
<input type="checkbox" id="checkall" value="a" onchange="$('.boxes').attr('checked',$('#checkall').attr('checked'));" />
 
</form>
 
</body>
</html>

                                              
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by: cxrPosted on 2009-08-07 at 11:24:58ID: 25045597

Line 15 could be simplified into this:

<input type="checkbox" onchange="$('.boxes').attr('checked',$(this).attr('checked'));" />
                                              
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by: flob9Posted on 2009-08-07 at 11:26:07ID: 25045610

<html>
    <head>
        <title>Test</title>
        <script type="text/javascript" src="jquery-1.2.6.pack.js">
        </script>
        <script type="text/javascript">
        	function toggle()
        	{
				if($('#check_a').attr('checked'))
				{
					$('#check_b,#check_c,#check_d').attr('checked', false);
				}
			}
      		$(document).ready(function() {
				$('#check_a').change(function() { toggle(); });
      		});
        </script>
    </head>
    <body>
    	A <input type="checkbox" id="check_a"/><br/>
    	B <input type="checkbox" id="check_b"/><br/>
    	C <input type="checkbox" id="check_c"/><br/>
    	D <input type="checkbox" id="check_d"/><br/>
    </body>
</html>

                                              
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by: flob9Posted on 2009-08-07 at 11:27:55ID: 25045632

Sorry, a bit late.

BTW, i prefer my way (no javascript in body) :p

 

by: PdesignzPosted on 2009-08-07 at 11:30:42ID: 25045656

cxr,

could that also be written into a function that would be in <head></head, if yes how would be done.

thanks

 

by: flob9Posted on 2009-08-07 at 11:35:08ID: 25045692

Pdesignz> if you want all javascript in <head>, you should use the code i pasted. You can also use classes like cxr did to select checkbox.

 

by: PdesignzPosted on 2009-08-07 at 11:38:45ID: 25045728

thanks, let me try

 

by: PdesignzPosted on 2009-08-07 at 11:49:54ID: 25045829

flob9, tested your code and does not work. I posted into my existing script and nothing, then I copied your complete source code and pasted into new document and same, it did not work

thanks

 

by: cxrPosted on 2009-08-07 at 12:33:40ID: 25046173

>> could that also be written into a function that would be in <head></head, if yes how would be done.

Sure, try this:

<html>
<head>
  <title>jQuery checkboxes</title>
  <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
  <script type="text/javascript">
  $(function(){
    $('#checkall').change(function(){
      $('.boxes').attr('checked',$(this).attr('checked'))
    });
  });
  </script>
 
</head>
 
<body>
 
<form>
<input type="checkbox" class="boxes" name="box_a" value="a" />
<input type="checkbox" class="boxes" name="box_b" value="b" />
<input type="checkbox" class="boxes" name="box_c" value="c" />
<input type="checkbox" class="boxes" name="box_d" value="d" />
<br />
Check all:
<input type="checkbox" id="checkall" />
 
</form>
 
</body>
</html>

                                              
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by: flob9Posted on 2009-08-07 at 12:51:27ID: 25046307

You need to change this line according to your jquery version :
<script type="text/javascript" src="jquery-1.2.6.pack.js">
        </script>


And, maybe you didn't try it right. The code I posted uncheck BCD when you check A. It was an example and should be adapted for your needs.

I think you could get the code you need mixing cxr and mine code.

use $('#boxid1,#boxid2) to select boxes by id, or, $('.boxclass') to select boxes by class.


 

by: PdesignzPosted on 2009-08-07 at 14:38:38ID: 25047162

seems to work in firefox, in IE if you click the main box, the others do not get a check, but then if you click elsewhere on the page then the rest of the checks appear.

Thanks

 

by: cxrPosted on 2009-08-07 at 15:01:27ID: 25047266

Indeed... the change event is not triggered until you leave the checkbox in IE. You can use the click event instead:

  <script type="text/javascript">
  jQuery(function($){
    $('#checkall').click(function(){
      $('.boxes').attr('checked',$(this).attr('checked'))
    });
  });
  </script>
                                              
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by: PdesignzPosted on 2009-08-07 at 15:12:36ID: 31613041

Great Work, thanks!!

 

by: flob9Posted on 2009-08-07 at 16:50:47ID: 25047653

Nice, points splitted between cxr and cxr :)

BTW, cxr, it is better to add events to elements when the page is fully loaded ( when $(document).ready is triggered), I had several bug because of this.

 

by: cxrPosted on 2009-08-07 at 18:29:19ID: 25047890

flob9,

your script did not work the way the asker wanted. A toggle function was requested, your script only unchecks, it does not check.

Both $(function{}) and jQuery(function($){}) are aliases for $(document).ready().

http://docs.jquery.com/Core/jQuery#callback
http://docs.jquery.com/Using_jQuery_with_Other_Libraries#Referencing_Magic_-_Shortcuts_for_jQuery

 

by: flob9Posted on 2009-08-07 at 18:57:34ID: 25047975

cxr> sorry, you're right about this. BTW, asker wanted examples... I provided a good one; I do not want to grab points here, but this seems just not fair. I tough asker did a mistake while splitting points.

 

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