function scroll(shift) {
		var currentTop,newTop;
		currentTop = parseInt(window.sportsNavBox.style.top);
		newTop = currentTop+shift;
		if ((newTop<=0) && (newTop>=(183-window.sportsNavHeight))) {
			window.sportsNavBox.style.top = newTop +'px';
		} else {
			if (newTop>0) {
				window.sportsNavBox.style.top = '0px';
			} else {
				window.sportsNavBox.style.top = (183-window.sportsNavHeight) + 'px';
			}
		}
	}
	
	function initScroll() {
		var container;
		window.sportsNavBox = document.getElementById('sportsnav');
		container = document.getElementById('sportsnavcontainer');
		window.sportsNavHeight = window.sportsNavBox.offsetHeight;
		window.sportsNavBox.style.top = 0;
	}
	
	function startScroll(shift) {
		window.scrollInterval = setInterval('scroll('+shift+')',25);
	}
	
	function stopScroll() {
		clearInterval(window.scrollInterval);
	}