function validate(input,data) {
	if (ajax) {
		ajax.open('get', 'validate_form.php?input=' + input + '&data=' + encodeURIComponent(data));
		ajax.onreadystatechange = function() {
				if ((ajax.readyState == 4) && (ajax.status == 200)) {
					document.getElementById('error_' + input).innerHTML = ajax.responseText;
				}
		}
		ajax.send(null);
	} else {
		document.getElementById('error_' + input).innerHTML = 'The availability of this username will be confirmed upon form submission.';
	}
}
/*
function handle_check() {

	// If everything's OK:
	if ( (ajax.readyState == 4) && (ajax.status == 200) ) {

		// Assign the returned value to a document element:
		document.getElementById('error_name').innerHTML = ajax.responseText;
		
	}
	
}
*/