$.xml = function( type, url, data, ret ) {
	var xml = new XMLHttpRequest();

	if ( xml ) {
		xml.open(type || "GET", url, true);
		xml.setRequestHeader('X-Requested-With', 'XMLHttpRequest');
		xml.setRequestHeader('Accept', 'text/javascript, text/html, application/xml, text/xml, */*');
		
		if ( data ) 
			xml.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');

		xml.onreadystatechange = function() {
			if ( xml.readyState == 4 ) {
				if ( ret ) ret(xml);
				$.triggerAJAX( $.httpData(xml) );
			}
		};

		xml.send(data)
	}
};

$.httpData = function(r,type) {
  var json = r.getResponseHeader('x-json');
  if (json) return eval("(" + json + ")");
  
	var contentType = r.getResponseHeader("content-type"); 
	if (contentType.indexOf("xml") > 0) return r.responseXML;
	if (contentType.indexOf("json") > 0) return eval("(" + r.responseText + ")");
	if (contentType.indexOf("javascript") > 0) eval(r.responseText);
	
	return r.responseText;
};