The .offset() gets the position of an element relative to the document. Also check jQuery .position().
Code:
<script>
$(function(){
var offset = $('.target').offset();
$('.target').append( ": left=" + offset.left + ", top=" + offset.top );
});
</script>
html:
<h3 class="target">get offset position with jQuery</h3>
css:
<style>
.target {
margin:20px;
padding:3px;
position:absolute;
left:10px;
top:5px;
}
</style>