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Set read only check box

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I want to set read only for check box when I click submit button. But my code didn't work. This is my code java script code.
Expand|Select|Wrap|Line Numbers
  1. document.getElementsById('check')[0].disabled=true;
  2. document.getElementsById('check')[1].disabled=true;
  3. or 
  4. document.getElementById('check')[0].readOnly=true;
  5. document.getElementById('check')[1].readOnly=true;
  6.  
could someone help me? I'm using php and javascript.
Nov 6 '09 #1
3 2616
Dormilich
8,658 Recognized Expert Moderator Expert
Expand|Select|Wrap|Line Numbers
  1. document.getElementsById('check')[0]
should be undefined. getElementsById () is an invalid method call.
Nov 6 '09 #2
acoder
16,027 Recognized Expert Moderator MVP
...and
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  1. document.getElementById('check')[0]
doesn't make sense because it returns a single element. You need to give your elements unique IDs or access them by name.
Nov 9 '09 #3
Dormilich
8,658 Recognized Expert Moderator Expert
@acoder
additional info: that call would look for the property "0" of the element with the id "check" and because Elements usually* don’t have such a property, undefined is returned.

* except when you explicity define such a property
Nov 9 '09 #4

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