var complete = 0;
	
	function enabletb(){
		if(document.getElementById('useremail').value == 'email@example.com') {
			document.getElementById('useremail').value = '';
			document.getElementById('useremail').style.color = '#00ccff';
			document.getElementById('useremail').style.textShadow = 'none';
		}
	}
	
	function submitemail(){
		if(complete == 0){
			document.getElementById('error-invalid').style.display = 'none';
			document.getElementById('error-exist').style.display = 'none';
			document.getElementById('error-none').style.display = 'none';
			document.getElementById('error-other').style.display = 'none';
			
			var response = get('verify.php?email='+escape(document.getElementById('useremail').value));
			
			if(response == 'success'){
				document.getElementById('email').style.display = 'none';
				document.getElementById('email-success').style.display = 'block';
				complete = 1;
			} else if(response == 'invalid') {
				document.getElementById('error-invalid').style.display = 'block';
			} else if(response == 'exist') {
				document.getElementById('error-exist').style.display = 'block';
			} else if(response == 'none') {
				document.getElementById('error-none').style.display = 'block';
			} else {
				document.getElementById('error-other').style.display = 'block';
			}
		}
	}
	
	function get(url){
		if (window.XMLHttpRequest) {
			// code for Decent Browsers
			xmlhttp=new XMLHttpRequest();
		} else {
			// code for IE6, IE5
			xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
		}
		
		xmlhttp.open("GET",url,false);
		xmlhttp.send();
		return xmlhttp.responseText;
	}