request.js

function webRequest(url, data, callback, target) {
	var http = new XMLHttpRequest();
	if(!data){ mode="GET"; } else { mode="POST"; }
	http.open(mode, url, true);
	if(mode=="POST"){ http.setRequestHeader('Content-Type','application/x-www-form-urlencoded'); }
	http.onreadystatechange = function(){ if(http.readyState==4){ callback(http.responseText,target); }};
	http.send(data);
}
//http://stackoverflow.com/questions/247483/http-get-request-in-javascript