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I have this code working but I can not figure out the last element. how do you get the “checkall” check box to be checked if all of the child check boxes are checked one at a time?
<html xmlns=”
<head runat=”server”>
<title>Untitled Page</title>
</head>
<script type=”text/javascript”>
function checkall(bu) {
var el, i=1;
while(el=document.getElementById(bu.id +(i++))) el.checked = bu.checked;
}
function checkall2(bu) {
var c = document.getElementById(bu.id.replace(/d/,””));
!bu.checked ? c.checked=false : null;
}
</script>
<body>
<form id=”form1″ runat=”server”>
<div>
<asp:CheckBox ID=”c” runat=”server” onclick=”checkall(this)”/>Check/Uncheck All
<input type=”checkbox” value=”” id=”c1″ onclick=”checkall2(this)”/>Abc
<input type=”checkbox” value=”” id=”c2″ onclick=”checkall2(this)”/>Def
<input type=”checkbox” value=”” id=”c3″ onclick=”checkall2(this)”/>Geh
<p>
<input type=”checkbox” value=”” id=”d” onclick=”checkall(this)”/>Check/Uncheck All
<input type=”checkbox” value=”” id=”d1″ onclick=”checkall2(this)”/>Ijk
<input type=”checkbox” value=”” id=”d2″ onclick=”checkall2(this)”/>Lmn
<input type=”checkbox” value=”” id=”d3″ onclick=”checkall2(this)”/>Opq
<p>
<input type=”checkbox” value=”” id=”e” onclick=”checkall(this)”/>Check/Uncheck All
<input type=”checkbox” value=”” id=”e1″ onclick=”checkall2(this)”/>Rst
<input type=”checkbox” value=”” id=”e2″ onclick=”checkall2(this)”/>Uvw
<input type=”checkbox” value=”” id=”e3″ onclick=”checkall2(this)”/>Xyz
</div>
</form>
</body>
</html>