.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;height:100%;width:100%;margin:0;padding:0;background:#222;opacity:.75;filter:alpha(opacity=75);-moz-opacity:.75;z-index:101}.modal-window{position:fixed;top:50%;left:50%;margin:0;padding:0;z-index:102}.close-window{position:absolute;width:29px;height:29px;right:-10px;top:-20px;background:url(close-button.png) right top no-repeat;text-indent:-99999px;overflow:hidden;cursor:pointer;opacity:.5;filter:alpha(opacity=50);-moz-opacity:.5}.close-window:hover{opacity:.99;filter:alpha(opacity=99);-moz-opacity:.99}