js随机飘动的广告图片代码demo效果示例（整理）

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<script><!--//公共脚本文件 main.jsfunction 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 removeEvent(obj, evtType, func, cap) {cap = cap || false;if (obj.removeEventListener) {obj.removeEventListener(evtType, func, cap);return true;} else if (obj.detachEvent) {if (cap) {obj.releaseCapture();return true;} else {return obj.detachEvent("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.AdCount = 0;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, addCloseButton) {if (!AdMoveConfig.IsInitialized) {AdMoveConfig.Resize();AdMoveConfig.IsInitialized = true;}AdMoveConfig.AdCount++;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;if (addCloseButton) {var closebtn = document.createElement("div");obj.appendChild(closebtn);closebtn.onclick = function () {obj.style.display = "none";clearInterval(interval);closebtn.onclick = null;obj.onmouseover = null;obj.onmouseout = null;obj.MoveHandler = null;AdMoveConfig.AdCount--;if (AdMoveConfig.AdCount <= 0) {removeEvent(window, "resize", AdMoveConfig.Resize);removeEvent(window, "scroll", AdMoveConfig.Scroll);AdMoveConfig.Resize = null;AdMoveConfig.Scroll = null;AdMoveConfig = null;}}}obj.MoveHandler = 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.SetLocation = function (vx, vy) { x = vx; y = vy; }this.SetDirection = function (vx, vy) { dirx = vx; diry = vy; }this.Run = function () {var delay = 10;interval = setInterval(obj.MoveHandler, delay);obj.onmouseover = function () { clearInterval(interval); }obj.onmouseout = function () { interval = setInterval(obj.MoveHandler, delay); }}}//-->
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<script type="text/javascript">$(function() {$("#close").click(function() {$("#main").hide();});})var ad1 = new AdMove("main", true);ad1.Run();
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js随机飘动的广告图片代码demo效果示例（整理）

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