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

// plug html markup into document
function insertAfter(newElement, targetElement)
{
	var parent = targetElement.parentNode;
	if(parent.lastChild == targetElement)
	{
		parent.appendChild(newElement);
	}
	else
	{
		parent.insertBefore(newElement,targetElement.nextSibling);
	}
}

// highlight current page in navbar
function highlightMain() 
{
	if (!document.getElementsByTagName) return false;
	if (!document.getElementById) return false;
	if (!document.getElementById("navigation")) return false;
	var nav = document.getElementById("navigation");

	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";
		}
	}
}

function highlightSec() 
{
	if (!document.getElementsByTagName) return false;
	if (!document.getElementById) return false;
	if (!document.getElementById("secondaryNav")) return false;
	var secNav = document.getElementById("secondaryNav");

	var secLinks = secNav.getElementsByTagName("a");
	for (var i=0; i<secLinks.length; i++) 
	{
		var secUrl = secLinks[i].getAttribute("href");
		var secCurrent = window.location.href;
		if (secCurrent.indexOf(secUrl) != -1) 
		{
			secLinks[i].className = "here";
			secLinks[i].setAttribute("id","secHere");
		}
	}
}

function highlightTer() 
{
	if (!document.getElementsByTagName) return false;
	if (!document.getElementById) return false;
	if (!document.getElementById("tertiaryNav")) return false;
	var terNav = document.getElementById("tertiaryNav");

	var terLinks = terNav.getElementsByTagName("a");
	for (var i=0; i<terLinks.length; i++) 
	{
		var terUrl = terLinks[i].getAttribute("href");
		var terCurrent = window.location.href;
		if (terCurrent.indexOf(terUrl) != -1) 
		{
			terLinks[i].className = "here";
		}
	}
}

addLoadEvent(highlightMain);
addLoadEvent(highlightSec);
addLoadEvent(highlightTer);