浮动广告

<SCRIPT LANGUAGE="JavaScript">
<!--
var showad = true;
var Toppx = 100;     //上端位置
var AdDivW = 100;   //宽度
var AdDivH = 300;   //高度
var PageWidth = 780;   //页面多少宽度象素下正好不出现左右滚动条
var MinScreenW = 1024;   //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 = '<br><a target="_blank" <a href="广告链接地址"><img border="0" <img border="0" src="图片地址" width="189" height="70"></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;
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.body.scrollTop+Toppx;
document.getElementById("Javascript.LeftDiv").style.left=document.body.scrollLeft+Borderpx;
document.getElementById("Javascript.RightDiv").style.display="";
document.getElementById("Javascript.RightDiv").style.top=document.body.scrollTop+Toppx;
document.getElementById("Javascript.RightDiv").style.left=document.body.scrollLeft+document.body.clientWidth-document.getElementById("Javascript.RightDiv").offsetWidth-Borderpx;
}

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>

<SCRIPT FOR=window EVENT=onload LANGUAGE="JScript">
initAd();//载入页面后，调用函数initAd()
</SCRIPT>
<script language="JScript">
<!--
function initAd() {
document.all.AdLayer.style.posTop = -200;//设置onLoad事件激发以后，广告层相对于固定后的y方向位置
document.all.AdLayer.style.visibility = 'visible'//设置层为可见
MoveLayer('AdLayer');//调用函数MoveLayer()
}
function MoveLayer(layerName) {
var x = 800;//浮动广告层固定于浏览器的x方向位置
var y = 300;//浮动广告层固定于浏览器的y方向位置
var diff = (document.body.scrollTop + y - document.all.AdLayer.style.posTop)*.80;
var y = document.body.scrollTop + y - diff;
eval("document.all." + layerName + ".style.posTop = y");
eval("document.all." + layerName + ".style.posLeft = x");//移动广告层
setTimeout("MoveLayer('AdLayer');", 20);//设置20毫秒后再调用函数MoveLayer()
}
//-->
</script>

<!--下面为一个ID为AdLayer的层（如ID名不为AdLayer，上面MoveLayer()内的AdLayer也要作相应修改），包括一张带链接的图片-->

<div id=AdLayer style='position:absolute; width:61px; height:59px; z-index:20; visibility:hidden;; left: 600px; top: 300px'>

<a href="http://www.5dmedia.com/bbs"><span onclick="document.all.AdLayer.style.visibility = 'hidden';return false;" >[关闭]</span> <img src="D:\\a.g' border="0" width="100"> </a>
</div>