Javascript's Journal

Validating checkbox[] array (solved..thanks)
I can't figure out how to access each labno[] value in my validation loop. The following example results in 5 messageboxes appearing - the first says 4, then undefined, undefined, undefined, undefined.

If I remove the apostrophes around labno[] (in the second alert line), the script dies with an error.

I'm stuck here and would greatly appreciate any pointers..

Code:

<script type="text/javascript">
    function CheckForm33(theForm)
    {

		labnos = document.frmAdd.elements['labno[]'].length;
		alert(labnos);

		for(i=0; i< labnos; i++)
		{

			alert(document.frmAdd.elements['labno[]'].value);

		} 


	}
</script>

<form name=frmAdd onsubmit='javascript: return CheckForm33(this);'>

<input type=checkbox name='labno[]' value=11><br>
<input type=checkbox name='labno[]' value=22><br>
<input type=checkbox name='labno[]' value=33><br>
<input type=checkbox name='labno[]' value=44><br>
<input type=submit>


</form>

EDITED:

Fixed with the following CheckForm33 function:

    function CheckForm33(theForm)
    {

        labnos = document.frmAdd.elements['labno[]'].length;
        alert(labnos);

        for(i=0; i< labnos; i++)
        {

            alert(document.frmAdd['labno[]'][i].value);

        }

    }