var ImgNum = 0;
var delay = 3000;
var lock = false;
var run;
var Images

function setitup(NewImg, Dir)
{
var i = 0 ;
	
	Images = new Array(NewImg.length) ; 
	
	while (i < NewImg.length)
	{
		Images[i] = Dir + "/" + NewImg[i] ;
		i = i + 1 ;	
	}
	document.slideshow.src = Images[0] ;
}

function chgImg(direction)
{
	if (document.images)
	{
		ImgNum = ImgNum + direction;
		if (ImgNum >= Images.length ) 
		{
			ImgNum = 0;
		}
		if (ImgNum < 0) 
		{
			ImgNum = Images.length - 1;
		}
		document.slideshow.src = Images[ImgNum];
   }
}
function auto() 
{
	if (lock == true) 
	{
		lock = false;
		window.clearInterval(run);
	}
	else if (lock == false) 
	{
		lock = true;
		//chgImg(NewImg, Dir, 1) ;
		run = setInterval("chgImg(1)", delay);
	}
}