function addOnload(newFunction) {
	var oldOnload = window.onload;
	
	if (typeof oldOnload == "function") {
		window.onload = function() {
			if (oldOnload) {
				oldOnload();
			}
			newFunction();
		}
	}
	else {
		window.onload = newFunction;
	} 
}

addOnload(loadExternalLinks)

/* Makes all external links load in a popup window AND */
/* Highlights current page in side nav bar */
function loadExternalLinks() {
	var Links = document.getElementsByTagName("A");
	
	for (var i = 0; i < Links.length; i++) {
		/* Makes all external links load in a popup window */
		if (Links[i].className == "externallink"){
			Links[i].onclick = loadPopup;
		}
		/* Highlights current page in side nav bar */
		if (Links[i].parentNode.parentNode.parentNode.id == "sidenavbar" && Links[i].innerHTML == document.getElementById("pagetitle").innerHTML)
			Links[i].className += " navhere"
	}
}

function loadPopup (){
	window.open(this.href);
	return false;
}