I wrote this for something else because I realized I was using jQuery just for Ajax bc I was too lazy to learn the actual DOM API for XHR.. This is Smaller.

lilball.js

/***
 * lil' ball
 *	this isn't even a library. I just realized that I'd been using jQuery *only* because 
 * I needed an easy way to do ajax. So I finally got my sh** together an just wrote smtng.
 *
 * author: @nickjacob
 ***/

;(function(window,undefined){
	window._o_ = window._o_ || {};
	var _doc = window.document,
		_cookie = window.document.cookie,
		_jprse = (JSON && JSON.parse) ? JSON.parse : function(e){return e;};

	window._o_.ajax = function(args){

		var rqst = (!window.ActiveXObject) ? new XMLHttpRequest() : 
		((newIE ? new AXO('Msxml2.XMLHTTP'): new AXO('Microsoft.XMLHTTP'))), data;
		

		var url=args.url + '?';
		for(var i in args.data){ 
			url += encodeURIComponent(i) + '=' + encodeURIComponent(args.data[i]) + '&'; 
		};


		rqst.open(args.method.toUpperCase(),url,true);


		rqst.onreadystatechange = function() {
			if(rqst.readystate===4){
				if(rqst.status===200){
					return args.success.call((ctx||null),_jprse(rqst.response));
				}
				else {
					return args.error.call((ctx||null),_jprse(rqst.response));
				}
			}
		};

		rqst.setRequestHeader('X-CSRFToken',_o_.getCookie('csrftoken'));

		for(var i in args.headers){
			rqst.setRequestHeader(i,args.headers[i]);
		}
		rqst.send();
	};

	window._o_.getCookie = function(attr) {
		attr = attr + '=';
		var cookie = _cookie.split(';'), clen = cookie.length;

		for(var i=0; i < clen;i++) {
			var curr = cookie[i];
			while(curr.charAt(0)===' ') curr.substring(1,curr.length); // ltrim

			if(curr.indexOf(attr)===0){
				return curr.substring(attr.length,curr.length);
			}
		}
	};

	window._o_.formSerialize = function(formElem) {
		var out = {}, elems = formElem.elements;
		for(var i=0,l=elems.length;i<l;i++) {
			if(elems[i] && elems[i].name && elems[i].value)
				out[elems[i].name] = elems[i].value;
		}
		return out;
	};

})(window);