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

var varHomeTDExperience = document.getElementById('home_td_experience');
addEvent(varHomeTDExperience, 'click', homeOptionClick, false);

var varHomeTDLearn = document.getElementById('home_td_learn');
addEvent(varHomeTDLearn, 'click', homeOptionClick, false);

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, 5000);
		}
		i = i - 1;

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

function homeOptionClick(e)
{
	var varSource = ((window.event) ? window.event.srcElement : e.target);
	var varHFNav = document.getElementById('HF_Nav');
	var varForm1 = document.getElementById('form1');
	
	switch (varSource.id)
	{
		case "home_td_experience":
			varHFNav.value = "nav_expo";
			break;
		case "home_td_learn":
			varHFNav.value = "nav_training";
			break;
		default:
			break;
	}
		
	varForm1.submit();
}