var varULNavList = document.getElementById('ul_nav_list');
varULNavList.style.visibility = 'hidden';

var ssParent = document.getElementById('div_signin');
var ssArray = ssParent.getElementsByTagName('img');
var ssIndex = ssArray.length - 1;
var ssInterval;
var i = 100;
slideShow();

function slideShow()
{
	ssInterval = window.setInterval(cycleImages, 1);

	function cycleImages()
	{
		ssArray[ssIndex].style.filter = 'alpha(opacity=' + i + ')';
		ssArray[((ssIndex == 0) ? ssArray.length - 1 : ssIndex - 1)].style.filter = 'alpha(opacity=' + (100 - i) + ')';
		ssArray[ssIndex].style.opacity = (i / 100);
		ssArray[((ssIndex == 0) ? ssArray.length - 1 : ssIndex - 1)].style.opacity = ((100 - i) / 100);
		if (i == 99)
		{
			window.clearInterval(ssInterval);
			window.setTimeout(slideShow, 3000);
		}
		i = i - 1;

		if (i == 0)
		{
			ssIndex--;
			i = 100;
			if (ssIndex == -1)
			{
				ssIndex = ssArray.length - 1;
			}
		}
	}
}