function startTimer()
{
	setTimeout("nextStep()", 5000);
}



function nextStep()
{
	var e = document.getElementById('banner_img');
	if (e == null)
	{
		alert('null');
		return;
	}

	if (++step >= 20)
	{
		if (++imgNum > 4)
			imgNum = 0;
		e.src = "/cms2012/image/banner_image_" + imgNum + ".jpg";
		step = 0;
	}

	if (step < 10)
		v = (1 * step + 1);
	else
		v = (20 - step) * 1;
	e.style.opacity = v / 10;
	e.style.filter = "alpha(opacity=" + (v * 10) + ")";

	if (step == 9)
		setTimeout("nextStep()", 5000);
	else
		setTimeout("nextStep()", 100);
}

var imgNum = 0;
var step = 8;