#mistake{background-image:url(/resources/js/mistakes/overlay.png);position:absolute;margin:auto;top:0;left:0;z-index:1000;width:100%}* html #mistake{background-image:none}#m_window{position:absolute;background:#fff;border:5px solid #aaa;border-radius:10px;overflow:auto;width:350px;height:400px;z-index:150}#m_frame{border:0;overflow:auto;width:100%;height:378px}* html #m_frame{margin-top:7px}