microajax.js

function microAjax(url, callbackFunction)
{
	this.bindFunction = function (caller, object) {
		return function() {
			return caller.apply(object, [object]);
		};
	};

	this.stateChange = function (object) {
		if (this.request.readyState==4)
			this.callbackFunction(this.request.responseText);
	};

	this.getRequest = function() {
		if (window.ActiveXObject)
			return new ActiveXObject('Microsoft.XMLHTTP');
		else if (window.XMLHttpRequest)
			return new XMLHttpRequest();
		return false;
	};

	this.postBody = (arguments[2] || "");

	this.callbackFunction=callbackFunction;
	this.url=url;
	this.request = this.getRequest();
	
	if(this.request) {
		var req = this.request;
		req.onreadystatechange = this.bindFunction(this.stateChange, this);

		if (this.postBody!=="") {
			req.open("POST", url, true);
			req.setRequestHeader('X-Requested-With', 'XMLHttpRequest');
			req.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
			req.setRequestHeader('Connection', 'close');
		} else {
			req.open("GET", url, true);
		}

		req.send(this.postBody);
	}
}