array radiobutton help me!

how disable array radiobutton so code:

<head>
<script>
function DisabledRadio() {
document.form1.radiobutton[0].disabled=true;
}
//-->
</script>
</head>

<input type="radio" name="radiobutton[0]" value="radiobutton1" onClick="DisabledRadio();">

</form>
</body>

hi,

U have named the radio button as
radiobutton[0].That was the error.

I think this might help u.
This would disable the first radio button.

<head>
<script>
function DisabledRadio() {
document.form1.radiobutton[0].disabled=true;
}
//-->
</script>
</head>

</form>
</body>

with regards,
preetha

hi,

I think this might help u more.
This would disable the radio button which u click.

<head>
<script>
var rad;
function DisabledRadio(rad) {
document.form1.radiobutton[rad].disabled=true;
}
//-->
</script>
</head>

</form>
</body>

with regards,
preetha