function updateLinks() {
	var background = document.getElementById('background');
	if (background) {
		var links_all = background.getElementsByTagName('a');
		if (links_all) {
			for (var i=0; i<links_all.length; i++) {
				if (links_all[i].className.match(/external/)) {
					var linkTitle = links_all[i].title+ ' [this link opens in a new window]';
					links_all[i].title = linkTitle;
					links_all[i].onclick = openExternalWindow;
				}
			}
		}
	}
}

function openExternalWindow() {
	window.open(this.href);
	return false;
}

window.onload = updateLinks;