function CheckUrl(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);
        }
}
//javascript/6958