function isvalidurl( chars ) {// chars = chars.replace(',',)//var re=/^([hh][tt]{2}[pp]://|[hh][tt]{2}[pp][ss]://)((((w+(-*w*)+).)+((com)|(net)|(edu)|(gov)|(org)|(biz)|(aero)|(coop)|(info)|(name)|(pro)|(museum))(.([a-z]{2}))?)|((w+(-*w*)+).(cn)))$/var re=/^([hh][tt]{2}[pp]://|[hh][tt]{2}[pp][ss]://)(s+.s+)$///var re=/^([hh][tt]{2}[pp]://|[hh][tt]{2}[pp][ss]://)(((((w+(-*w*)+).)+((com)|(net)|(edu)|(gov)|(org)|(biz)|(aero)|(coop)|(info)|(name)|(pro)|(me)|(cc)|(museum)|(cn)|(tv)|(hk))(.([a-z]{2}))?)|((w+(-*w*)+).(cn)))((/|?)s*)*)$/if (!isnull(chars)) {chars = jstrim(chars)if (chars.match(re) == null)return falseelsejs判断url是否有效的两种方法如下：
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.baidu.com")
}
方法二:(利用jquery,适用所有浏览器)
function NetPing() {
$.ajax({
type: "GET",
cache: false,
url: "http://www.baidu.com",
data: "",
success: function() {
Done(1)
},
error: function() {
Done(0)
}
})
}
