js判断url是否有效的两种方法_javascript技巧

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.gxlcms.com");
}

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

}