Back To Javascript Gurus, Problem Is Check Box Arrays

I'm having an array dynamically fetched from the database using php, in result, I'm getting a check box, with their corresponding value.

I wanted to make a javascript function so that if I uncheck a checkbox, corresponding value disappears.

Before going to the looping, I was trying to do a simple check - like this -

function checkOtherValues() {
if (document.myform.checkmember[0].checked==false) {
document.myform.checkvalue[0].value="";
}
}
I thought this should work, but I'm getting the following error -


document.myform.checkmember.0 is null or not an object For the form, it's set in this way -

<input type="checkbox" name="checkmember[]" value="<?=$chmember[$i]?>" onClick="return checkOtherValues()">
<input type="text" name="checkvalue[]" size="5" value="<?=$chvalue[$i]?>" />