Could someone please look at this for me. Please. I cannot figure out why the form will not go to the xml file and check the emails on it. It is supposed to check the xml for the email and if it is on the xml file then it returns "you cannot use this form"

HTML

Code:
<!DOCTYPE html>
<html lang="en">
	<head>
		<script type="text/javascript">
			var asyncRequest;
					
			function getEmail(file)
				{
					document.getElementById("email").innerHTML = "";
					asyncRequest = new XMLHttpRequest();
					asyncRequest.onreadystatechange = "";
				
					asyncRequest.open("GET", file, true);
					asyncRequest.send(null); 
					
					
					
						if (document.email== false)
							{
								window.alert("You cannot use this form!");
							}
						else
							{
								window.alert("Your form will be processed!");
							}
				}
			
		</script>
	</head>
	<body>
	<header>
		<h1>E-Mail Form</h1>
	</header>
	<label for="email">E-Mail Address</label>
	<input type="text" name="email" value="" id="email" />
	<label for="firstName">First Name</label>
	<input type = "text" name="firstName" value = "" id ="firstName" />
	<label for="lastName">Last Name</label>
	<input type = "text" name = "lastName" value ="" id= "lastName"  />
	<input type="button" name="submit" value="Submit" id="Submit" onclick="getEmail('email.xml')" />
	
	</div>
	<footer>
		&copy; BLE
	</footer>
</body>
</html>

XML

Code:
<?xml version="1.0"?>
<address>
	<address>
		<email>frautani@ymail.com</email>
	</address>
		<address>
		<email>stella@ymail.com</email>
	</address>
		<address>
		<email>timster@aol.com</email>
	</address>
</address>