var tickerContainer;
var tickerItems;
var currentItem = 0;
var tickerWidth;
var tickerHeight;
var animationTimeout;
var tickerInterval;

function setupTicker()
{
	// locate the ticker container
	tickerContainer = null;
	if (document.all)
		tickerContainer = document.all.TickerContainer;
	else
		tickerContainer = document.getElementById('TickerContainer');
	
	if (tickerContainer != null)
	{
		// now determine the width of the container
		if (tickerContainer.clientWidth > 0)
			tickerWidth = tickerContainer.clientWidth;
		else
			tickerWidth = tickerContainer.offsetWidth;
		tickerHeight = 0;
		
		// now process through the div elements within the ticker and determine the tallest one
		tickerItems = tickerContainer.getElementsByTagName('div');
		for (index = 0; index < tickerItems.length; index++)
		{
			// determine the height for this item and see if it's the largest we've seen so far
			if (tickerItems[index].clientHeight > 0)
				itemHeight = tickerItems[index].clientHeight;
			else
				itemHeight = tickerItems[index].offsetHeight;
			
			if (itemHeight > tickerHeight)
				tickerHeight = itemHeight;
		}
		
		// now specify the height of our container and each item to be the largest height
		tickerContainer.style.height = tickerHeight + 'px';
		tickerContainer.style.overflow = 'hidden';
		for (index = 0; index < tickerItems.length; index++)
		{
			tickerItems[index].style.height = tickerHeight + 'px';
			tickerItems[index].style.width = tickerWidth + 'px';
			tickerItems[index].style.overflow = 'hidden';
		}
		
		// now that everyone is the same height, we can easily jump from one to the next
		// start the ticker
		tickerInterval = setInterval('showNextTickerItem();', 4500);
	}
}
function showNextTickerItem()
{
	// determine the next ticker item
	currentItem = (currentItem + 1) % tickerItems.length;
	
	// clear any existing animations
	clearTimeout(animationTimeout);
	
	// scroll to the position of this item in the container
	animateScrollFromTo(currentItem * tickerHeight);
}
function animateScrollFromTo(finalPosition)
{
	// move 1 more pixel
	var currentPosition = tickerContainer.scrollTop;
	var scrollPosition = currentPosition + 1;
	
	// set the new scroll position
	if (scrollPosition < finalPosition)
	{
		tickerContainer.scrollTop = scrollPosition;
		animationTimeout = setTimeout('animateScrollFromTo(' + finalPosition + ');', 5);
	}
	else
	{
		tickerContainer.scrollTop = finalPosition;
	}
}

if (window.addEventListener)
{
	window.addEventListener('load', setupTicker, false);
}
else if (window.attachEvent)
{
	window.attachEvent('onload', setupTicker);
}