rnd.today=new Date();
	rnd.seed=rnd.today.getTime();
	
	function rnd() {
	        rnd.seed = (rnd.seed*9301+49297) % 233280;
	        return rnd.seed/(233280.0);
	};
	
	function rand(number_small) {
	        return Math.ceil(rnd()*number_small);
	};
	
	var number_small = rand(19);