选中/取消

<script type="text/javascript">
function CheckAll(form)
{
for (var i=0;i<form.elements.length;i++)
{
var e = form.elements[i];
if (e.Name != "chkAll"&&e.disabled!=true)
e.checked = form.chkAll.checked;
}
}
</script>

<form name="froms">
<input type="checkbox" value="1" name="chk_sex"  />男
<input type="checkbox" value="2" name="chk_sex" />女<br />
<input name="chkAll" type="checkbox" id="chkAll" onclick=CheckAll(this.form) value="checkbox">
选中/取消所有
</form>