$(document).ready(function()
{
	$('input[type="submit"]').click(function()
	{
		var $emailfield = $('input#email').val();
		
		if($emailfield=='')
		{
			alert('You left the Email Address* field empty.');
		}
		else
		{
			var $pattern = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
			if(!$pattern.test($emailfield))
			{
				alert('The provided email address is not formatted correctly or does not exist.');
			}
			else
			{
				$("form").submit();
			}
		}
		return false;
	});
});