function ShowLayer()
{
 document.all.FlatLayer.style.display="block";
}
function CloseLayer()
{
 document.all.FlatLayer.style.display="none";
}
ShowLayer();
setTimeout("CloseLayer()",10000);//这里是广告显示的时间
document.write('<div style="DISPLAY: none" id=FlatLayer align=center name="FlatLayer"><table border=0 cellSpacing=0 cellPadding=0 width="100%" align=center><tbody><tr><td align=middle><img border=0 src="http://www.hxmryy.com/images/new-wrap-bg-3.20.jpg" width=977 height=137 /></td></tr></tbody></table></div><!--头部广告结束-->');