var width;
var timer;
var SlideisActive = 0;
function MoveItem(Action,Items,ItemWidth,Steps)
{
	if (SlideisActive == 0)
	{
		width = (Items-1)*ItemWidth;
		timer = window.setInterval(Action+"("+ItemWidth+","+Steps+")",1);
		SlideisActive = 1;
	}
}
function Next(ItemWidth,Steps)
{
	var left = document.getElementById("slider").style.left;
	if (left == "")
	{
		left = 0;
	}
	left = parseInt(left)-Steps;
	if (left == (-1)*width)
	{
		left = 0;
	}
	document.getElementById("slider").style.left = left + "px";	
	if (left%ItemWidth == 0)
	{
		window.clearInterval(timer);
		SlideisActive = 0;
	}		
}
function Prev(ItemWidth,Steps)
{
	var left = document.getElementById("slider").style.left;	
	if (left == "")
	{
		left = 0;
	}
	left = parseInt(left);
	if (left == 0)
	{
		left = -width;
	}
	else
	{
		left = left+Steps;
	}
	document.getElementById("slider").style.left = left + "px";
	if (left%ItemWidth == 0 && left != -width)
	{
		window.clearInterval(timer);
		SlideisActive = 0;
	}	
}