document.write("<div name=\"FlatLayer\" id=\"FlatLayer\" style=\"display:none;\" align=\"center\"><img src=\"images/ad/rlb_sb.jpg\" border=\"0\" onClick=\"CloseLayer();\"></div>")

function ShowLayer()
{
 document.all.FlatLayer.style.display="block";
}
function CloseLayer()
{
 document.all.FlatLayer.style.display="none";
}
ShowLayer();
setTimeout("CloseLayer()",8000);//这里是广告显示的时间
// JavaScript Document