var rand_var = 0;
var inframe = 0;
var laps = 0;
function switchImages()
{
	document.getElementById('rand_ads').innerHTML = frames["rand_iframe"].document.body.innerHTML;
	setTimeout("reloadFrame()", rand_timeout);
}
function fadeOut()
{
	for (var i = 100; i >= 0; i--)
		setTimeout('setOpacity('+i+')', 2*(100-i));
}
function fadeIn()
{
	for (var i = 1; i <= 100; i++)
		setTimeout('setOpacity('+i+')', 2*i);
}
function setOpacity(value)
{
	var obj = document.getElementById("rand_ads").style;
	obj.opacity = value / 100; 
	obj.filter = "alpha(opacity=" + value + ")";
		
	if (value == 0)
	{
		switchImages();
		fadeIn();
	}
	if (value == 100)
		obj.filter = null;
}
function setImages()
{
	if (rand_var == 0)
	{
		rand_var = 1;
		switchImages();
	}
	else
		fadeOut();
}
function reloadFrame()
{
	if (++laps < max_laps)
	{
		if (inframe == 0)
			frames["rand_iframe"].location.reload(true);
		else
			setTimeout("reloadFrame()", rand_timeout);
	}
}