//document.write('<st'+'yle>body{margin:0;margin-top:52px;border-top:1px solid black;}</st'+'yle><d'+'iv id="ad" style="    position:absolute;    width:100%;height:50px;left:0px;top:0px;;background:#cccccc;    border:0;">This is ad.</d'+'iv>');
//document.write('<if'+'rame id="ad2" src="notexists.html" width="5" height="2">This is ad. too</if'+'rame>');