#mistake{background-image:url(overlay.png);left:0;margin:auto;position:absolute;top:0;width:100%;z-index:10000}* html #mistake{background-image:none}#m_window{background:#fff;border:5px solid #aaa;border-radius:10px;height:400px;overflow:auto;position:absolute;width:350px;z-index:150}#m_frame{border:0;height:378px;overflow:auto;width:100%}* html #m_frame{margin-top:7px}