$.ajaxSetup ({
		cache: false
	});

var ajax_load = "<img class='loading' src='images/load.gif' alt='loading...' />";
var loadUrl = "ajax/email.php";

	$('#email').keyup(function(){
		var emailAddress = document.getElementById('email').value;
		var submitForm = document.getElementById('submitForm');		
		var formResult = document.getElementById('formResult');
		
		submitForm.disabled = false;
		formResult.innerHTML = '';
		
		$("#emailCheck").html(ajax_load);
		$.post(
			loadUrl,
			{email: emailAddress},
			function(responseText){
				$("#emailCheck").html(responseText);
				if(responseText.search('Stop') > 0){
					submitForm.disabled = true;
					formResult.innerHTML = '<p style="padding:10px;border:1px solid #F00;background:#FCC;">The email address you entered has already been registered.<br /><br /><a href="#start" style="color:#900;">Click here to use a different email.</a></p>';
				}
				else{
					submitForm.disabled = false;
					formResult.innerHTML = '';
				}
			},
			"html"
		);
	});