function addLoadEvent(func){
	var oldonload = window.onload;
	if (typeof window.onload != 'function'){
		window.onload = func;
	} else {
		window.onload =function (){
			oldonload();
			func();
		}
	}
}

function insertAfter(newElement,targetElement){
	var parent = targetElement.parentNode;
	if (parent.lastChild == targetElement){
		parent.appendChild(newElement);
	} else { 
		parent.insertBefore(newElement,targetElement.nextSibling);
	}
}

function addClass(element,value){
	if (!element.className){
		element.className = value;
	} else {
		newClassName = element.className;
		newClassName+= " ";
		newClassName+= value;
		element.className = newClassName;
	}
}