Mega Code Archive
Coordinates of the cursor relative to the screen
<![CDATA[
<html>
<head>
<script type="text/javascript">
function coordinates(event){
alert("X=" + event.screenX + " Y=" + event.screenY)
}
</script>
</head>
<body onmousedown="coordinates(event)">
<p>Click in the document. </p>
</body>
</html>
]]>