function getUniverse(form)
{
	form.universe.options.length = 1;

	if (form.domain.value == '') {
		form.universe.disabled = true;
		return;
	} else {
		form.universe.disabled = false;
	}

	var xmlhttp;

	if(window.XMLHttpRequest) {
		xmlhttp = new XMLHttpRequest();
	} else if(window.ActiveXObject) {
		xmlhttp = new ActiveXObject('Microsoft.XMLHTTP');
	} else {
		alert('Cannot create XMLHTTP instance.');
		return;
	}

	xmlhttp.onreadystatechange = function() {
		if (xmlhttp.readyState == 4) {
			if (xmlhttp.status == 200) {
				var result = eval('(' + xmlhttp.responseText + ')');

				for (var i in result) {
					form.universe.options[form.universe.options.length] = new Option(result[i], i);
				}
			} else {
				alert('There was a problem with the request.');
			}
		}
	}

	xmlhttp.open('POST', 'ajax/getUniverse.php', true);
	xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	xmlhttp.send('domain=' + form.domain.value);
}