function addOnLoadEvent(func) {
	var oldOnLoad = window.onload;
	if (typeof window.onload != "function") {
		window.onload = func;
	}
	else {
		window.onload = function() {
			oldOnLoad();
			func();
		}
	}
}

function addOnBeforeUnloadEvent(func) {
	var oldOnBFUnLoad = window.onbeforeunload;
	if (typeof window.onbeforeunload != "function") {
		window.onbeforeunload = func;
	}
	else {
		window.onbeforeunload = function() {
			oldOnBFUnLoad();
			func();
		}
	}
}


function insertAfter(newElement, targetElement) {
	var parent = targetElement.parentNode;

	if (parent.lastChild == targetElement)
		parent.appendChild(newElement);
	else
		parent.insertBefore(newElement, targetElement.nextSibling);
	
}