mrbanan,
не осилил я ваших речей ...
<!DOCTYPE HTML>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
.my{
position: absolute;
width: 10px;
height: 10px;
background-color: #0000CD;
}
</style>
</head>
<body>
<div class="my" style="top: 274px; left: 215px;"></div>
<div class="my" style="top: 145px; left: 115px;"></div>
<div class="my" style="top: 352px; left: 415px;"></div>
<div class="my" style="top: 474px; left: 325px;"></div>
<script>
var arr = [].map.call( document.querySelectorAll('.my'), function(el) {
var pos = el.getBoundingClientRect()
return {top : pos.top, left: pos.left}
});
document.write(JSON.stringify(arr))
</script>
</body>
</html>