Validasi Email Dengan Javascript

Published by Concept Phone Senin, 17 September 2018

/* Created by: Anita Sudhakar :: http://www.smartwebby.com/DHTML/email_validation.asp */ function echeck(str) {     var at = "@";     var dot = ".";     var lat = str.indexOf(at);     var lstr = str.length;     var ldot = str.indexOf(dot);     if (str.indexOf(at) == -1) {         alert("ID Email tidak valid!");         return false;     }     if (str.indexOf(at) == -1 || str.indexOf(at) == 0 || str.indexOf(at) == lstr) {         alert("ID Email tidak valid!");         return false;     }     if (str.indexOf(dot) == -1 || str.indexOf(dot) == 0 || str.indexOf(dot) == lstr) {         alert("ID Email tidak valid!");         return false;     }     if (str.indexOf(at, (lat + 1)) != -1) {         alert("ID Email tidak valid!");         return false;     }     if (str.substring(lat - 1, lat) == dot || str.substring(lat + 1, lat + 2) == dot) {         alert("ID Email tidak valid!");         return false;     }     if (str.indexOf(dot, (lat + 2)) == -1) {         alert("ID Email tidak valid!");         return false;     }     if (str.indexOf(" ") != -1) {         alert("ID Email tidak valid!");         return false;     }     return true; }  function ValidateForm() {     var emailID = document.frmSample.txtEmail;      if ((emailID.value == null) || (emailID.value == "")) {         alert("Ketik alamat email Anda!");         emailID.focus();         return false;     }     if (echeck(emailID.value) == false) {         emailID.value = "";         emailID.focus();         return false;     }     return true; }

<form name='frmSample' method='post' action='#' onSubmit='return ValidateForm()'> Masukkan alamat email:      <input type='text' name='txtEmail' />      <input type='submit' name='submit' value='Submit' /> </form>

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Pembaharuan

Filter yang lebih sederhana dengan regex dari Dynamic Drive:

/*  * Email Validation script - © Dynamic Drive (www.dynamicdrive.com)  * This notice must stay intact for legal use.  * Visit http://www.dynamicdrive.com/ for full source code  */  var emailfilter = /^\w+[\+\.\w\-]*@([\w\-]+\.)*\w+[\w\-]*\.([a-z]{2,4}|\d+)$/ig;  function checkmail(e) {     var checkval = emailfilter.test(e.value);     if (checkval == false) {         alert("ID Email tidak valid!");         e.select();     }     return checkval; }

<form name='taufik'>     <input name='prikitiwform' type='text' />     <input type='submit' onClick='return checkmail(this.form.prikitiwform)' value='Submit' /> </form>

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Sumber https://www.dte.web.id/