jQuery Position
by Marko Keuschnig
HTML
<span id="parent">Parent - </span><span id="parent-position"></span>
<span id="child">Child</span>
JavaScript
$(document).ready(function() {
var parentPosition = $("#parent").position();
var parentHeight = $("#parent").height();
var parentWidth = $("#parent").width();
$("#parent-position").text("Top: " + parentPosition.top +
"; Left: " + parentPosition.left +
"; Height: " + parentHeight +
"; Width: " + parentWidth);
$("#child").css({top: parentPosition.top + parentHeight, left: parentPosition.left + parentWidth, position:'absolute'});
});