JS网址正则验证

function IsURL(str_url){

        var strRegex = "^((https|http|ftp|rtsp|mms)?://)"

        + "?(([0-9a-z_!~*'().&=+$%-]+: )?[0-9a-z_!~*'().&=+$%-]+@)?" //ftp的user@

        + "(([0-9]{1,3}\.){3}[0-9]{1,3}" // IP形式的URL- 199.194.52.184

        + "|" // 允许IP和DOMAIN（域名）

        + "([0-9a-z_!~*'()-]+\.)*" // 域名- www.

        + "([0-9a-z][0-9a-z-]{0,61})?[0-9a-z]\." // 二级域名

        + "[a-z]{2,6})" // first level domain- .com or .museum

        + "(:[0-9]{1,4})?" // 端口- :80

        + "((/?)|" // a slash isn't required if there is no file name

        + "(/[0-9a-z_!~*'().;?:@&=+$,%#-]+)+/?)$";

        var re=new RegExp(strRegex);

        //re.test()

        if (re.test(str_url)){

            return (true);

        }else{

            return (false);

        }

}