PostSparrow

Javascript Code

<input type="text" name="email" id="email" placeholder="Enter Email" >
<script>
	$(document).ready(function(){
		$('#email').keypress(function(e){
			var re = /[A-Z0-9a-z@\._]/.test(e.key);
			if (!re) {
				return false;
			}
		});
	});
</script>