js: <script type="text/javascript"> var x = 500,y = 60 var xin = true, yin = true var step = 1 var delay = 10 var obj=document.getElementById("img") function floatwww_qpsh_com() { var L=T=0 var R= document.body.clientWidth-obj.offsetWidth var B = document.body.clientHeight-obj.offsetHeight obj.style.left = x + document.body.scrollLeft obj.style.top = y + document.body.scrollTop x = x + step*(xin?1:-1) if (x < L) { xin = true; x = L} if (x > R){ xin = false; x = R} y = y + step*(yin?1:-1) if (y < T) { yin = true; y = T } if (y > B) { yin = false; y = B } } var itl= setInterval("floatwww_qpsh_com()", delay) obj.onmouseover=function(){clearInterval(itl)} obj.onmouseout=function(){itl=setInterval("floatwww_qpsh_com()", delay)} </script> .net:<%@ Page Language="C#" MasterPageFile="~/Head.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WEB.Default" Title="无标题页" EnableViewState="false" %><asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server"></asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server"> <asp:Literal ID="lit_ad" runat="server"></asp:Literal> <div id="main">
<script type="text/javascript">
var x = 500,y = 60
var xin = true, yin = true
var step = 1
var delay = 10
var obj=document.getElementById("img")
function floatwww_qpsh_com() {
var L=T=0
var R= document.body.clientWidth-obj.offsetWidth
var B = document.body.clientHeight-obj.offsetHeight
obj.style.left = x + document.body.scrollLeft
obj.style.top = y + document.body.scrollTop
x = x + step*(xin?1:-1)
if (x < L) { xin = true; x = L}
if (x > R){ xin = false; x = R}
y = y + step*(yin?1:-1)
if (y < T) { yin = true; y = T }
if (y > B) { yin = false; y = B }
}
var itl= setInterval("floatwww_qpsh_com()", delay)
obj.onmouseover=function(){clearInterval(itl)}
obj.onmouseout=function(){itl=setInterval("floatwww_qpsh_com()", delay)}
</script>
.net:<%@ Page Language="C#" MasterPageFile="~/Head.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs"
Inherits="WEB.Default" Title="无标题页" EnableViewState="false" %><asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server"></asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
<asp:Literal ID="lit_ad" runat="server"></asp:Literal>
<div id="main">
<div id="img" style="position: absolute; width: 200; height: 151">
<a href="whjzw.net">
<img src="1.jpg" border="0"></a>
</div>
</div>