function highlightPage() {
	if (!document.getElementsByTagName) return false;
	if (!document.getElementById) return false;
	if (!document.getElementById("main-nav")) return false;
	var nav = document.getElementById("main-nav");
	var links = nav.getElementsByTagName("a");
	for (var i=0; i<links.length; i++) {
		var linkurl = links[i].getAttribute("href");
		var currenturl = window.location.href;
		if (currenturl.indexOf(linkurl) != -1) {
			links[i].className = "here";
		}
	}
}

//external link script
function externalLinks() {
 if (!document.getElementsByTagName) return;
 var anchors = document.getElementsByTagName("a");
 for (var i=0; i<anchors.length; i++) {
   var anchor = anchors[i];
   if (anchor.getAttribute("href") &&
       anchor.getAttribute("rel") == "external")
     anchor.target = "_blank";
 }
}


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

addLoadEvent(highlightPage);
addLoadEvent(externalLinks);