[转]js判断url是否有效

本文转自：http://www.cnblogs.com/fumj/p/3490121.html

方法一:(仅适用于ie)

 function CheckStatus(url){XMLHTTP = new ActiveXObject("Microsoft.XMLHTTP")XMLHTTP.open("HEAD",url,false)XMLHTTP.send()return XMLHTTP.status==200}function NetPing(){return CheckStatus("http://www.163.com/index.html");}

方法二:(利用jquery,适用所有浏览器)

function NetPing() {$.ajax({type: "GET",cache: false,url: "http://www.163.com/index.html",data: "",success: function() {Done(1);},error: function() {Done(0);}});}