Set Values of UnChecked CheckBoxes

[ShoeLace1291]

I need to be able to set the values of a checkbox if it's unchecked.  I have an array of checkboxes that I'm looping through in PHP so the values of all unchecked boxes in the form need to be set to 0(zero).  How would I do this with javascript?

[trq]

Unchecked checkboxes are not submitted, is this your problem?

[ShoeLace1291]

Yes.  When the form is submitted, I need the script to find all checkboxes that are unchecked and set their value to zero.

[trq]

Easy enough to do with jquery, something like....

 

$(document).ready(function() {
  $('#submittbn').submit(function() {
    $("input[type='checkbox']").not(':checked')).each(function() {
      $this.val(0).attr('checked', true);
    });
  });
});

[ShoeLace1291]

I've never used JQuery, or I would figure it out on my own, but I'm getting syntax errors in firebug's error console.

[RussellReal]

jQuery is a library created by someone, you need to get the jQuery js file

 

but you can do it without jQuery, and probably with the same amount of code

 

 

Edit: Well, probably a couple lines more, but thats not the reason for my edit.. Thorpe's example (which is probably the only way to do it anyway.. minus the jquery) would set checked attribute to true, which will literally tick the checkbox you'd want to ALSO set the value of the checkbox to 0.. just a sidenote

[trq]

you'd want to ALSO set the value of the checkbox to 0

 

Which is what this bit....

 

$this.val(0)

 

does.

[RussellReal]

you'd want to ALSO set the value of the checkbox to 0

 

Which is what this bit....

 

$this.val(0)

 

does.

 

wow jquery does it all huh.. so val() actually returns the updated element after the value change?

 

I personally never used jQuery

[trq]

Most jQuery methods return a jQuery object so you can chain methods together easily.

[ShoeLace1291]

can someone be so kind as to make a code for me?  i only know a little bit of javascript or else i would make it myself.

[trq]

I already did.

[ShoeLace1291]

it doesn't work.

[gizmola]

jQuery is a library created by someone, you need to get the jQuery js file

 

but you can do it without jQuery, and probably with the same amount of code

 

 

Edit: Well, probably a couple lines more, but thats not the reason for my edit.. Thorpe's example (which is probably the only way to do it anyway.. minus the jquery) would set checked attribute to true, which will literally tick the checkbox you'd want to ALSO set the value of the checkbox to 0.. just a sidenote

[RussellReal]

jQuery is a library created by someone, you need to get the jQuery js file

 

but you can do it without jQuery, and probably with the same amount of code

 

 

Edit: Well, probably a couple lines more, but thats not the reason for my edit.. Thorpe's example (which is probably the only way to do it anyway.. minus the jquery) would set checked attribute to true, which will literally tick the checkbox you'd want to ALSO set the value of the checkbox to 0.. just a sidenote

 

ily man

[ShoeLace1291]

I downloaded the jquery file and uploaded it to my server.  still doesn't work.

[RussellReal]

now you need to include it..

 

<script type="text/javascript" src="jQuery.js"></script>

[trq]

Put this just before your </body> tag.

 

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.1/jquery.min.js"></script>

 

My code is also untested so it might need some debugging in firebug.