function roll2() {
	var x = document.getElementById('box').style.top;
	y = parseInt(x.replace(/px/g ,""));
	
	if(y < 45) {
		y = y+2;
		document.getElementById('box').style.top = y+'px';
		setTimeout("roll()", 1);
	}

}

function roll() {
	document.getElementById('box').style.top = '10px';
	document.getElementById('newyear').style.visibility = 'visible';
}