<html>
<head>
<title></title>
<script language="JavaScript" type="text/javascript">
function Ck(obj,nme){
var eles=obj.form.elements;
for (var zxc0=0;zxc0<eles.length;zxc0++){
if (eles[zxc0].name&&eles[zxc0].name==nme) eles[zxc0].checked=obj.checked;
}
}
</script>
</head>
<body>
<form >
<input type="checkbox" name="id[]" ><br>
<input type="checkbox" name="id[]" ><br>
<input type="checkbox" name="id[]" ><br>
<input type="checkbox" name="id[]" ><br>
<input type="checkbox" name="id[]" ><br />
<input type="checkbox" name="" onclick="Ck(this,'id[]');">Check All/None
</form>
</body>
</html>