#mistake{background-image:url("https://user76527.clients-cdnnow.ru/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;;-webkit-border-radius:20px;-moz-border-radius:20px;border-radius:20px;background:rgba(240,240,240,1.00);color:black;font-size:22px;overflow:auto;width:350px;height:550px;z-index:150}
#m_frame{border:0;overflow:auto;width:100%;height:528px}
* html #m_frame{margin-top:7px}