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Javascript Validation

function validate(form_id,email) {

  var reg = /^([A-Za-z0-9_-.])+@([A-Za-z0-9_-.])+.([A-Za-z]{2,4})$/;
  var address = document.forms[form_id].elements[email].value;
  if(reg.test(address) == false) {

     alert('Invalid Email Address');
     return false;
   }
}
<form id="form_id" method="post" action="action.php"
onsubmit="javascript:return validate('form_id','email');">

  <input type="text" id="email" name="email" />

   <input type="submit" value="Submit" />
</form>

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Javascript validation karan

  • 1. Javascript Validation function validate(form_id,email) { var reg = /^([A-Za-z0-9_-.])+@([A-Za-z0-9_-.])+.([A-Za-z]{2,4})$/; var address = document.forms[form_id].elements[email].value; if(reg.test(address) == false) { alert('Invalid Email Address'); return false; } } <form id="form_id" method="post" action="action.php" onsubmit="javascript:return validate('form_id','email');"> <input type="text" id="email" name="email" /> <input type="submit" value="Submit" /> </form>