email id validation in javascript

address entered is correct * ENTER: STR String * Returns: TRUE or Flase; True indicates a well-formed/function Checkip (str) {var arg =/^ (\d{1,2}|1\d\d|2[0-4]\d|25[0-5]) \. ( \D{1,2}|1\D\D|2[0-4]\D|25[0-5]) \. (\d{1,2}|1\D\D|2[0-4]\D|25[0-5]) \. (\d{1,2}|1\d\d|2[0-4]\d|25[0-5]) $/; if (Str.match (arg) = = null) {return false; else {return true; }/** * Check that the URL address entered is correct * ENTER: STR String * Returns: TRUE or Flase; True indicates a well-formed/function Checkurl

JavaScript implements validation of identity card numbers and prompts function Nunber (allowancepersonvalue) {if (allowancepersonvalue== "identity card number") {$ ("#span_username"). Show (); $ ("#span_username"). HTML ("Identity card number cannot be empty"); return false; }//Checksum length, type else if (Iscardno (allowancepersonvalue) = = False) {$ ("#span_username"). Show (); $ ("#span_

, 9, 10, 5, 8, 4, 2, 1]; Weighted factor var validecode = [1, 0, 10, 9, 8, 7, 6, 5, 4, 3, 2]; ID card Verification bit value. 10 represents X function Idcardvalidate (idcard) {Idcard = Trim (idcard.replace (//g, "")); Remove the string and tail space if (idcard.length = =) {return Isvaliditybrithby15idcard (Idcard); Verification of 15-bit IDs} else if (Idcard.length =) {var A_idcard = Idcard.split (""); Get

;} Else {Return false;}}}/*Determine whether the certificate number meets the requirements. The certificate number contains Chinese characters, numbers, uppercase/lowercase letters, (,), and ,(,),-True is returned, not false.*/Function isZSBH (str ){If ("" = str ){Return false;}For (var I = 0; I var c = str. charAt (I );Alpha = "ABCDEFGHIJKLMNOPQRSTUVWXYZ ";Alpha + = "abcdefghijklmnopqrstuvwxyz ";Alpha + = "()-";If (! IsChinese (c )! IsNumber (c) alpha. indexOf (c) =-1 ){Return false;}}Return t