validate email input javascript onchange
<script type="text/javascript"> function ShowAlert() { var email = document.getElementById('txtEmailId'); var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/; if (!filter.test(email.value)) { alert('Please provide a valid email address'); email.focus; return false; } else { alert("Thanks for your intrest in us, Now you will be able to receive monthly updates from us."); document.getElementById('txtEmailId').value = ""; } } </script>
