IE和FireFox下javascript读写XML实现广告轮换

2009-12-16 23:46| 发布者: admin| 查看: 87| 评论: 0|原作者: 墨元

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
xml结构如下

http://www.seehaha.com/images/060901-150.100.2.gif
http://www.seehaha.com/xml/061009-300.100.jpg
http://www.seehaha.com/plan/
http://www.seehaha.com/va.htm

==
// 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").
情缘.教程_网 [http://Www.XiuGoo.Com]
href = href(i).text;document.getElementById("tupian").src = src(i).text; //实现轮换 }}

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IE和FireFox下javascript读写XML实现广告轮换

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