#wrap { width: 441px; position: relative; }
#small { position: relative; width: 100%; }
#large { background: white; position: relative; width: 441px; }
#mover { position: absolute; top: 0; left: 0; width: 124px; height: 124px; overflow: hidden; z-index: 5; background: white; display: none; }
#overlay{ border:1px solid blue; width: 122px; height: 122px; position: absolute; top: 0; left: 0; z-index: 6; }