#wrap          { width: 600px; position: relative; }
#small         { position: relative; width: 100%; }
#large         { background: white; position: relative; width: 600px; }
#mover         { position: absolute; top: 0; left: 0; width: 104px; height: 104px; overflow: hidden; z-index: 100; background: white; display: none; }
#overlay       { border: 1px solid blue; width: 102px; height: 102px; position: absolute; top: 0; left: 0; z-index: 200; }