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;
	}
	
	function toggle() {
		for ( var i=0; i < arguments.length; i++ ) {
			$(arguments[i]).style.display = ($(arguments[i]).style.display != 'none' ? 'none' : '' );
		}
	}
	
	function toggleNode(nodeId, sectionId) {
    var action;
    var obj = document.getElementById(sectionId);
    if (obj.style.display == "block") {
        obj.style.display = "none";
        document.getElementById(nodeId).className = "nodePlus";
    } else if (obj.style.display == "none") {
        obj.style.display = "block";
        document.getElementById(nodeId).className = "nodeMinus";
    }
}