最近更新网站首页广告,ASP.NET的广告控件很容易实现这点,可首页是静态页面,联想广告控件的原理决定采用javascript+xml实现这点方面配置,更新广告时只要更新xml即可,方便了广告轮换
(本文来源于图老师网站,更多请访问http://m.tulaoshi.com/webkaifa/)xml结构如下
ad
tupianhttp://edu.itbulo.com/UploadFiles_1485/200610/20061010132448597.jpg/tupian
dizhihttp://www.seehaha.com/plan//dizhi
dizhihttp://www.seehaha.com/va.htm/dizhi
/ad
==
// JScript 文件 var Now = new Date(); var Min = Now.getSeconds(); var i; if((Min % 2) == 1)//读取秒数,根据奇偶随机轮换,当然也可以改变此处算法增加xml节点数 { i = 1; } else { i = 0; }var url = "xml/ads.xml";String.prototype.Trim = function() { return this.replace(/(^s*)|(s*$)/g, ""); }var xmlDoc;//判断是否为Firefox或IE var moz = (typeof document.implementation != 'undefined') && (typeof document.implementation.createDocument != 'undefined'); var ie = (typeof window.ActiveXObject != 'undefined');function importXML(file) { if (moz) { xmlDoc = document.implementation.createDocument("", "doc", null);//创建Firefox下XML文档对象 } else if (ie) { xmlDoc = new ActiveXObject("MSXML2.DOMDocument.3.0"); xmlDoc.async = false; while( xmlDoc.readyState != 4) {};//创建IE下XML文档对象 } xmlDoc.load(file);}importXML(url);//载入xmlfunction updatetupiandizhi(){if (moz) { var ad = xmlDoc.getElementsByTagName("ad")[0]; var tupian; var _tupian = ad.getElementsByTagName("tupian")[i].firstChild.nodeValue; if (_tupian) tupian = _tupian.Trim(); //得到tupian,dizhi节点下的值 var dizhi; var _dizhi=ad.getElementsByTagName("dizhi")[i].firstChild.nodeValue; if(_dizhi) dizhi = _dizhi.Trim(); document.getElementById('tupian').href = tupian; document.getElementById('dizhi').src = dizhi; //实现轮换 } else if (ie) {var src = xmlDoc.documentElement.selectNodes("tupian");var href = xmlDoc.documentElement.selectNodes("dizhi");/得到tupian,dizhi节点下的值 document.getElementById("dizhi").href = href(i).text;document.getElementById("tupian").src = src(i).text; //实现轮换 }}