JS Help

[MrCraig]

Anyone know whats wrong with my function (ie when a box is checked, the bgcolor of the row changes..

Its just showing JS error and nothing happens

<script type="text/javascript">
function turn(id)
{
var check = "f" + id;
var rowid = "r" + id;
if(document.form.getElementById(check).checked = false)
 {
 //The box has been unchecked
 document.form.getElementById(rowid).bgcolor = "#FFFFFF";
 }
 else
 {
 //The box has been checked..
 document.form.getElementById(rowid).bgcolor = "#CCFFFF";
 }
}
</script>

[MrCraig]

Couldnt edit,

found and fixed the problem, forgot to give the checkbox field an id and didnt use the style.backgroundColor attrib.

ty anyways.