var flag = false;
var	arr1 = new Array(3);
var	arr2 = new Array(3);

function HideAll()
{
	window.topImage.style.display = "none";
	window.middleImage.style.display = "none";
	window.bottomImage.style.display = "none";
}

function ShowImage( show, control, index ) 
{
	var arrToUse = (show == 1) ? arr1 : arr2;
	
	control.src = arrToUse[index];
	control.style.display = "inline";
}

function StartShow( show )
{
	//HideAll();
	if (show == 1)
	{
		window.setTimeout( 'ShowImage( 1, window.topImage, 0 )', 0 );
		window.setTimeout( 'ShowImage( 1, window.middleImage, 1 );', 1000 );
		window.setTimeout( 'ShowImage( 1, window.bottomImage, 2 );', 2000 );
	}
	else
	{
		window.setTimeout( 'ShowImage( 2, window.topImage, 0 );', 0 );
		window.setTimeout( 'ShowImage( 2, window.middleImage, 1 );', 1000 );
		window.setTimeout( 'ShowImage( 2, window.bottomImage, 2 );', 2000 );
	}
}

function swapImgs()
{
	if (flag)
	{
		StartShow( 1 );
	}
	else
	{
		StartShow( 2 );
	}
	
	flag = (flag) ? false : true;
}

function loader()
{
	HideAll();
	arr1[0] = "images/Ad1.gif";
	arr1[1] = "images/Ad2.gif";
	arr1[2] = "images/Ad3.gif";
		
	arr2[0] = "images/Ad4.gif";
	arr2[1] = "images/Ad5.gif";
	arr2[2] = "images/Ad6.gif";
	
	StartShow( 1 );
	window.setInterval("swapImgs();", 3000);

}