function swapNav(image,file) {
	image.src="images/nav/"+file;
}

function enhancePage() {
	if (!document.getElementsByTagName) return;

	//Open external links in a new window
	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";
	}
}

window.onload=enhancePage;