用javascript操作xml

g_topmenuxml为Xml字符串变量

 var xml=null;
if (navigator.appName.indexOf("Microsoft") != -1) {
    xml = new ActiveXObject("Msxml2.DOMDocument"); 
   xml.loadXML(g_topmenuxml); xml.async=false;
} else {
    var parser=new DOMParser();
    xml =parser.parseFromString(g_topmenuxml,"text/xml");
}
var ml = xml.getElementsByTagName("menu");
for(var i=0;i<ml.length;i++){
 alert("id="+ml[i].getAttribute("id")+";name="+ml[i].getAttribute("name")+";");
}