兼容各大浏览器带关闭按钮的漂浮多组图片广告代码

给大家分析一段经典而且兼容各大浏览器的漂浮广告代码，希望对大家有所帮助

JS部分： 

<script type="text/javascript" language="javascript"> 
function addEvent(obj, evtType, func, cap) { 
cap = cap || false; 
if (obj.addEventListener) { 
obj.addEventListener(evtType, func, cap); 
return true; 
} else if (obj.attachEvent) { 
if (cap) { 
obj.setCapture(); 
return true; 
} else { 
return obj.attachEvent("on" + evtType, func); 
} 
} else { 
return false; 
} 
} 
function getPageScroll() { 
var xScroll, yScroll; 
if (self.pageXOffset) { 
xScroll = self.pageXOffset; 
} else if (document.documentElement && document.documentElement.scrollLeft) { 
xScroll = document.documentElement.scrollLeft; 
} else if (document.body) { 
xScroll = document.body.scrollLeft; 
} 
if (self.pageYOffset) { 
yScroll = self.pageYOffset; 
} else if (document.documentElement && document.documentElement.scrollTop) { 
yScroll = document.documentElement.scrollTop; 
} else if (document.body) { 
yScroll = document.body.scrollTop; 
} 
arrayPageScroll = new Array(xScroll, yScroll); 
return arrayPageScroll; 
} 
function GetPageSize() { 
var xScroll, yScroll; 
if (window.innerHeight && window.scrollMaxY) { 
xScroll = document.body.scrollWidth; 
yScroll = window.innerHeight + window.scrollMaxY; 
} else if (document.body.scrollHeight > document.body.offsetHeight) { 
xScroll = document.body.scrollWidth; 
yScroll = document.body.scrollHeight; 
} else { 
xScroll = document.body.offsetWidth; 
yScroll = document.body.offsetHeight; 
} 
var windowWidth, windowHeight; 
if (self.innerHeight) { 
windowWidth = self.innerWidth; 
windowHeight = self.innerHeight; 
} else if (document.documentElement && document.documentElement.clientHeight) { 
windowWidth = document.documentElement.clientWidth; 
windowHeight = document.documentElement.clientHeight; 
} else if (document.body) { 
windowWidth = document.body.clientWidth; 
windowHeight = document.body.clientHeight; 
} 
if (yScroll < windowHeight) { 
pageHeight = windowHeight; 
} else { 
pageHeight = yScroll; 
} 
if (xScroll < windowWidth) { 
pageWidth = windowWidth; 
} else { 
pageWidth = xScroll; 
} 
arrayPageSize = new Array(pageWidth, pageHeight, windowWidth, windowHeight) 
return arrayPageSize; 
} 
var AdMoveConfig = new Object(); 
AdMoveConfig.IsInitialized = false; 
AdMoveConfig.ScrollX = 0; 
AdMoveConfig.ScrollY = 0; 
AdMoveConfig.MoveWidth = 0; 
AdMoveConfig.MoveHeight = 0; 
AdMoveConfig.Resize = function () { 
var winsize = GetPageSize(); 
AdMoveConfig.MoveWidth = winsize[2]; 
AdMoveConfig.MoveHeight = winsize[3]; 
AdMoveConfig.Scroll(); 
} 
AdMoveConfig.Scroll = function () { 
var winscroll = getPageScroll(); 
AdMoveConfig.ScrollX = winscroll[0]; 
AdMoveConfig.ScrollY = winscroll[1]; 
} 
addEvent(window, "resize", AdMoveConfig.Resize); 
addEvent(window, "scroll", AdMoveConfig.Scroll); 
function AdMove(id) { 
if (!AdMoveConfig.IsInitialized) { 
AdMoveConfig.Resize(); 
AdMoveConfig.IsInitialized = true; 
} 
var obj = document.getElementById(id); 
obj.style.position = "absolute"; 
var W = AdMoveConfig.MoveWidth - obj.offsetWidth; 
var H = AdMoveConfig.MoveHeight - obj.offsetHeight; 
var x = W * Math.random(), y = H * Math.random(); 
var rad = (Math.random() + 1) * Math.PI / 6; 
var kx = Math.sin(rad), ky = Math.cos(rad); 
var dirx = (Math.random() < 0.5 ? 1 : -1), diry = (Math.random() < 0.5 ? 1 : -1); 
var step = 1; 
var interval; 
this.SetLocation = function (vx, vy) { x = vx; y = vy; } 
this.SetDirection = function (vx, vy) { dirx = vx; diry = vy; } 
obj.CustomMethod = function () { 
obj.style.left = (x + AdMoveConfig.ScrollX) + "px"; 
obj.style.top = (y + AdMoveConfig.ScrollY) + "px"; 
rad = (Math.random() + 1) * Math.PI / 6; 
W = AdMoveConfig.MoveWidth - obj.offsetWidth; 
H = AdMoveConfig.MoveHeight - obj.offsetHeight; 
x = x + step * kx * dirx; 
if (x < 0) { dirx = 1; x = 0; kx = Math.sin(rad); ky = Math.cos(rad); } 
if (x > W) { dirx = -1; x = W; kx = Math.sin(rad); ky = Math.cos(rad); } 
y = y + step * ky * diry; 
if (y < 0) { diry = 1; y = 0; kx = Math.sin(rad); ky = Math.cos(rad); } 
if (y > H) { diry = -1; y = H; kx = Math.sin(rad); ky = Math.cos(rad); } 
} 
this.Run = function () { 
var delay = 10; 
interval = setInterval(obj.CustomMethod, delay); 
obj.onmouseover = function () { clearInterval(interval); } 
obj.onmouseout = function () { interval = setInterval(obj.CustomMethod, delay); } 
} 
} 
</script>

<script type="text/javascript" language="javascript"> 
    var ad2 = new AdMove("ad2");
    ad2.Run();
    //多组漂浮

</script>

html部分：

<DIV id=ad2 style="Z-INDEX: 5;position:relative"><a href='PoliceHTk.aspx' target='_blank'><IMG src="images/fudong/fudong.jpg" width="230" height="150" border="0" > </a><br> <a href="#" onclick="document.getElementById('ad2').style.display='none'">                   <img border=0 src=images/fudong/close1.gif /></a> 
</DIV>