// create xhtml compliant links to external sites
function externalLinks() { 
	if (!document.getElementsByTagName) {
		// do nothing
	} else {
		var anchors = document.getElementsByTagName("a");
		for(i=0; i<anchors.length; i++) {
			var anchor = anchors[i];
			if (anchor.getAttribute("rel") == "external") {
				anchor.target = "_blank";
			}
		}
	} 
}

addEvent(window,'load',externalLinks);

var on = false;
function advanced(){
	if (!document.getElementById) {
		// do nothing
	} else {
		var advanced = document.getElementById("advanced");
		if (!on) {
			advanced.style.display = "block";
			on = true;
		}
		else {
			advanced.style.display = "none";
			on = false;
		}
	}
}