AJAX及XML的一些常见问题

1，不同浏览器对xml的读入方式不同。解决方法

function loadXMLDoc(dname) { try //Internet Explorer { xmlDoc=new ActiveXObject("Microsoft.XMLDOM"); } catch(e) { try //Firefox, Mozilla, Opera, etc. { xmlDoc=document.implementation.createDocument("","",null); } catch(e) {alert(e.message)} } try { xmlDoc.async=false; xmlDoc.load(dname); return(xmlDoc); } catch(e) {alert(e.message)} return(null); }  

2，不同浏览器创建AJAX的http对象的问题

function GetActive() { if (window.ActiveXObject) { //for ie var httplist = ["MSXML2.XMLHttp.5.0","MSXML2.XMLHttp.4.0","MSXML2.XMLHttp.3.0","MSXML2.XMLHttp","Microsoft.XMLHttp"]; for(var i = httplist.length -1;i >= 0;i--) { try{ return new ActiveXObject(httplist[i]); } catch(ex) { } } } else if (window.XMLHttpRequest) { //for other return new window.XMLHttpRequest(); } } 

示例网址：http://www.nowmsg.com/