window.onload = setupPage;

function setupPage()
{
	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";
		}
	}
}

var preloadImages = false;

var nav_home_out = new Image();
var nav_about_out = new Image();
var nav_articles_out = new Image();
var nav_contact_out = new Image();

nav_home_out.src = "images/nav_home_out.gif";
nav_about_out.src = "images/nav_about_out.gif";
nav_articles_out.src = "images/nav_articles_out.gif";
nav_contact_out.src = "images/nav_contact_out.gif";

var nav_home_over = new Image();
var nav_about_over = new Image();
var nav_articles_over = new Image();
var nav_contact_over = new Image();

nav_home_over.src = "images/nav_home_over.gif";
nav_about_over.src = "images/nav_about_over.gif";
nav_articles_over.src = "images/nav_articles_over.gif";
nav_contact_over.src = "images/nav_contact_over.gif";

preloadImages = true;

function changeImage(imgName, imgState)
{
	if (preloadImages)
	{
		window.document.images[imgName].src = eval("nav_" + imgName + "_" + imgState + ".src");
	}
}