Email validation using javascript
function checkEmail() { var email = document.getElementById('txtEmail'); 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; } } - Call the function on Email textbox