function switchMenu(obj, imgUrl) {
	var el = document.getElementById(obj);
	if ( el.style.display != "none" ) {
		el.style.display = 'none';
	}
	else {
		el.style.display = '';
		
	}
	
	//We assume that image id is {obj}Img
	var img = document.getElementById(obj + "Img");
	if (img.src.indexOf("plus.gif")>1) {
		img.src = imgUrl + "minus.gif";
		img.alt = "Open";
	} else {
		img.src = imgUrl + "plus.gif";
		img.alt = "Closed";
	}
}

function collapseAll(objs) {
var i;
for (i=0;i<objs.length;i++ ) {
objs[i].style.display = 'none';
}
}

function $() {
var elements = new Array();
for (var i = 0; i < arguments.length; i++) {
var element = arguments[i];
if (typeof element == 'string')
element = document.getElementById(element);
if (arguments.length == 1)
return element;
elements.push(element);
}
return elements;
}