Onmousemove.html

<html>

<head>
	<style type="text/css">
		div {
			border: #090DCF 1px solid;
			height: "200px";
			width: "200px";
		}
	</style>
</head>

<body>
	<div id="mydiv" onMouseMove="scale(event)"></div>
	<p id="demo"></p>
	<script type="text/javascript">
		function scale(e) {
			var x = e.clientX;
			var y = e.clientY;
			var coord = "coordinates:(" + x + "," + y + ")";
			document.getElementById("demo").innerHTML = coord;
		}
	</script>
</body>

</html>