function showsub(obj) {
	var el = document.getElementById(obj);
	el.style.display = '';
}

function hidesub(obj) {
	var el = document.getElementById(obj);
	el.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;
}

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

function expandAll(objs) {
	var i;
	for (i=0;i<objs.length;i++ ) {
		objs[i].style.display = '';
	}
}