JavaScript DHTML/Dojo toolkit/coords
Get tag coordinates
<html>
<head>
<script type="text/javascript">
var djConfig = {
baseScriptUri : "js/dojo/"
};
</script>
<script type="text/javascript" src="js/dojo/dojo/dojo.js"></script>
<script>
function doCoords() {
alert(dojo.toJson(dojo.coords("myDiv")));
}
</script>
</head>
<body onLoad="doCoords();">
<div id="myDiv">I am myDiv</div>
</body>
</html>