<!DOCTYPE html>
<html>
<head>
<style>
div {
width: 200px;
height: 100px;
border: 1px solid black;
}
</style>
</head>
<body>
<div onmousemove="showCoords(event)" onmouseout="clearCoor()"></div>
<p>Mouse over the rectangle above to get the horizontal and vertical coordinates of your mouse pointer.</p>
<p id="demo"></p>
<script>
function showCoords(event) {
var x = event.clientX;
var y = event.clientY;
var coor = "X coords: " + x + ", Y coords: " + y;
document.getElementById("demo").innerHTML = coor;
}
function clearCoor() {
document.getElementById("demo").innerHTML = "";
}
</script>
</body>
</html>