function rollOn(current) {
		document[current].src = eval(current + '_lit.src');
	}

	function rollOff(current) {
		 document[current].src = eval(current + '_off.src');
	}
	
	function windowOpen(url, title, attributes) {
		window.open(url, title, attributes);
	}
	
	function windowClose() {
		this.close();
	}