不错的漂浮广告代码2

又一漂浮广告代码，图片会在屏幕中不断游动，且总能保持在屏幕中，测试了一下，应该可在任何支持javascript的浏览器中正常工作。

代码如下：

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;
        }
        //脚本: AdMove.js
        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); }
            }
        }

  var myhtml="<div id="pagefloatPic" style=" 110px; height: 72px; Z-INDEX:999999">";
      myhtml+="<a href="打开的页面url" target="_blank">";

myhtml+="<img src="图片url" border="0" style=" 150; height:80" />

</a><table width='150' bgcolor='#CCCCCC' border='0' cellpadding='0' cellspacing='0'><tr><td bgcolor=#CCCCCC align=right height=18 style='font-size:12px;'><a href=# onclick='HiddenAD()'>关闭</a></td></tr></table>";
      myhtml+="</div>";
      document.write(myhtml);
      var pagead1 = new AdMove("pagefloatPic
          pagead1.Run();
 
function HiddenAD()
{
   document.getElementById("pagefloatPic").style.display="none";
}

　　如果，需要该代码的Js文件，可以直接下载，然后在网页的Html源代码中使用

<script type='text/javascript' src='你的js文件url'></script>调用。