/**
 * @author georgewing
 */

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;
	}
}

function popup() {
	if(!document.getElementsByTagName || !document.getElementsByTagName("a")) return false;
	
	a = document.getElementsByTagName("a");
	for(i=0;i<a.length;i++) {
		if(a[i].getAttribute("rel") && a[i].getAttribute("rel") == "external") {
			a[i].onclick = function() {
				window.open(this.getAttribute('href'));
				return false;
			};
		}
	}
}
addLoadEvent(popup);