$(function() {	
	$('#submit').click(function(e) {
		if ($('#your_email').val() == '') {
			$('#your_email').attr("placeholder","Email address is required");
			$('#your_email').attr("value","");
			return false;
		}
		else {
			if (!isValidEmail($('#your_email').val())) {
				$('#your_email').attr("placeholder","Email address is invalid, please try again...");
				$('#your_email').attr("value","");
				return false;
			}
			else {
				return true;
			}
		}
	});
	
	function isValidEmail(email) {
		var regex = /^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
		return regex.test(email);
	}
});