var images=new Array();
images[0] = new Image();
images[0].src = "/images/website/nav_on.png";
images[1] = new Image();
images[1].src = "/images/website/nav_off.png";

var id;
function swapImage() {
	a = swapImage.arguments;
	id = a[0];
	document.getElementById('item_'+id).style.backgroundImage = 'url(' + images[0].src + ')';
}
function swapRestore() {
	document.getElementById('item_'+id).style.backgroundImage = 'url(' + images[1].src + ')';
}

function submenu() {
	a = submenu.arguments;
	display = document.getElementById('submenu_'+a[0]).style.display;
	document.getElementById('submenu_'+a[0]).style.display = display=='none'?'block':'none'
}
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";
		}
	}
}
window.onload = externalLinks