<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
div{
width:200px;
height:200px;
background:red;
}
</style>
</head>
<body>
<div id="oblong"></div>
</body>
<script type="text/javascript">
document.getElementById('oblong').οnmοusedοwn=function(){
var oblong=document.getElementById("oblong");
oblong.style.cursor="pointer";
document.οnmοusemοve=function(){
var x=event.clientX;
var y=event.clientY;
oblong.style.position='fixed';
oblong.style.left=(x-100)+'px';
oblong.style.top=(y-100)+'px';
}
}
document.getElementById("oblong").οnmοuseup=function(){
document.οnmοusemοve=false;
}
</script>
</html>