window.onload = function () {

	// add the button
	var myButton = document.createElement("input");
	myButton.type="button";
	myButton.value="myButton - click me";
	document.body.appendChild(myButton);
	
	// prepare callback function
	var myCallback = function () {
		alert("myButton has been clicked");
	};
	
	// register the callback
	lib.evt.add(myButton, "click", myCallback);
};