JavaScript DHTML/Node Operation/elementFromPoint
"elementFromPoint()" Example
<html>
<body>
<script language="JavaScript">
function function1() {
var m = document.elementFromPoint(150, 150);
var n = m.tagName;
alert("The element located at point (150, 150) is "+n);
}
</script>
<button onclick="function1();">Click to reveal element</button>
</body>
</html>