匹配IPfunction isIP1(strIP) {      if (strIP == ""){
   return false};      var strRegex= /^((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])\.){3}(25[0-5]|2[0-4][0-9]|1[09][0-9]|[1-9][0-9]|[0-9]|\*)$/ //匹配IP地址的正则表达式    if(strRegex.test(strIP)){
   return true;}        return false;  }

//返回val的字节长度(中文算两个字节) function getByteLen(val) {    var len = 0;    for ( var i = 0; i < val.length; i++) {        if (val[i].match(/[^\x00-\xff]/ig) != null) //全角            len += 2;        else            len += 1;    }    return len;}

验证URLvar strRegex = "^((https|http)://)?[a-z0-9A-Z]{3}\.[a-z0-9A-Z][a-z0-9A-Z]{0,61}?[a-z0-9A-Z]\.com|net|cn|cc (:s[0-9]{1-4})?/$"; var re = new RegExp(strRegex);re.test(str)