javascript 正则验证URI

<script language="JavaScript"> 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);         }    } </script>

php中utf-8编码下用正则表达式匹配汉字的最终准确表达式——/^[\x{4e00}-\x{9fa5}]+$/u，