<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<style>
div{
width: 50px;
height: 50px;
line-height: 50px;
text-align: center;
border: 1px solid red;
background: red;
position: absolute;
}
</style>
<script>
window.onload = function(){
var oDiv = document.getElementsByTagName('div');
for(var i=0;i<20;i++){
document.body.innerHTML +='<div>'+i+'</div>';
}
for (var i = 0; i < oDiv.length+1; i++) {
j = oDiv.length - i;
if(i<10){
oDiv[i].style.left = 50*i+'px';
oDiv[i].style.top = 50*i+'px';
}else{
oDiv[i].style.left = 50*i+'px';
oDiv[i].style.top = 50*j+'px';
}
}
};
</script>
</head>
<body>
</body>
</html>
