js广告代码div横幅如何居中显示

[弹出广告js代码广告置于右下角的解决方法]可关闭，可最小化，带点淡入淡出效果的右下角弹出广告；参考如下：右下角广告代码#msg_win{border:1px solid #A67901;background:#EAEAEA;width:300px;position:absolute;right:2;m...+阅读

js广告代码div横幅如何居中显示

可以遮挡ie6下的select元素但是在ie6下div没有透明度；弹出的div可以一直在浏览器屏幕中间显示。代码：var _CalF = { //便捷方法$ ： function(id){return document.getElementById(id)},create : function(id){return document.createElement(id)},append : function(id){return document.body.appendChild(id)},remove : function(id){return document.body.removeChild(id)} } function popup(openID,conID,closeID){ this.onclick(openID,conID,closeID); } popup.prototype = { cssStyle : ＂width:100%;position:absolute;left:0;top:0;filter:alpha(opacity = 50);opacity:0.5;border:0;overflow:auto;＂,createShadowDiv : function（){ //背景遮罩 var shadowDiv = _CalF.create(＂div＂); shadowDiv.id = ＂shadowDiv＂; shadowDiv.style.cssText = this.cssStyle; shadowDiv.style.height = document.body.scrollHeight + ＂px＂; shadowDiv.style.backgroundColor = ＂#000＂ shadowDiv.style.zindex = 100; _CalF.append(shadowDiv); },createIframe : function(){ //iframe var iframe = _CalF.create(＂iframe＂); iframe.id = ＂shadowIframe＂; iframe.style.cssText = this.cssStyle; iframe.style.height = document.body.scrollHeight + ＂px＂; iframe.style.zindex = 99; _CalF.append(iframe); },removeDiv : function(){ _CalF.remove(_CalF.$(＂shadowDiv＂)); _CalF.remove(_CalF.$(＂shadowIframe＂)); },onclick : function(openID,conID,closeID){ var that = this; _CalF.$(openID).onclick = function(){ if(window.ActiveXObject){ //ie6 if(!window.XMLHttpRequest){ document.body.style.cssText = ＂_background-image: url(about:blank);_background-attachment: fixed;＂; } } that.createIframe(); that.createShadowDiv(); _CalF.$(conID).style.display = ＂block＂; } document.getElementById(closeID).onclick = function(){ _CalF.$(conID).style.display = ＂none＂; that.removeDiv(); } } } var bt = new popup(＂bt＂,＂orderMsg＂,＂close＂);