符合XHTML带关闭按钮的对联广告代码

<script language="javascript" type="text/javascript">
<!--
var showad = true;        //是否显示广告
var Toppx = 60;            //上端位置
var AdDivW = 100;        //宽度
var AdDivH = 360;        //高度
var PageWidth = 800;    //页面多少宽度象素下正好不出现左右滚动条
var MinScreenW = 1000;    //显示广告的最小屏幕宽度象素
var ClosebuttonHtml = '<div align="right" style="position: absolute;top:0px;right:0px;margin:2px;padding:2px;z-index:2000;"><a href="javascript:;" onclick="hidead()" style="color:red;text-decoration:none;font-size:12px;">关闭</a></div>'
var AdContentHtml = '<div align="center" style="color:green;font-size:23pt;font-family:黑体;"><br><br>广<br>告<br>内<br>容<br/><a href="http://www.mydongli.com/" target="_blank">广元动力网络</a></div>';
document.write ('<div id="Javascript.LeftDiv" style="position: absolute;border: 1px solid #336699;background-color:#EEEEE2;z-index:1000;width:'+AdDivW+'px;height:'+AdDivH+'px;top:-1000px;word-break:break-all;display:none;">'+ClosebuttonHtml+'<div>'+AdContentHtml+'</div></div>');
document.write ('<div id="Javascript.RightDiv" style="position: absolute;border: 1px solid #336699;background-color:#EEEEE2;z-index:1000;width:'+AdDivW+'px;height:'+AdDivH+'px;top:-1000px;word-break:break-all;display:none;">'+ClosebuttonHtml+'<div>'+AdContentHtml+'</div></div>');
function scall(){
    if(!showad){return;}
    if (window.screen.width<MinScreenW){
        //alert("临时提示：nn显示器分辨率宽度小于"+MinScreenW+",不显示广告");
        showad = false;
        document.getElementById("Javascript.LeftDiv").style.display="none";
        document.getElementById("Javascript.RightDiv").style.display="none";
        return;
    }
    var Borderpx = ((window.screen.width-PageWidth)/2-AdDivW)/2;
    document.getElementById("Javascript.LeftDiv").style.display="";
    document.getElementById("Javascript.LeftDiv").style.top=(document.documentElement.scrollTop+Toppx)+"px";
    document.getElementById("Javascript.LeftDiv").style.left=(document.documentElement.scrollLeft+Borderpx)+"px";
    document.getElementById("Javascript.RightDiv").style.display="";
    document.getElementById("Javascript.RightDiv").style.top=(document.documentElement.scrollTop+Toppx)+"px";
    document.getElementById("Javascript.RightDiv").style.left=(document.documentElement.scrollLeft+document.documentElement.clientWidth-document.getElementById("Javascript.RightDiv").offsetWidth-Borderpx)+"px";
}
function hidead()
{
    showad = false;
    document.getElementById("Javascript.LeftDiv").style.display="none";
    document.getElementById("Javascript.RightDiv").style.display="none";
}
window.onscroll=scall;
window.onresize=scall;
window.onload=scall;
//-->
</script>