/*
 * Copyright (C) 2005-2006
 * by Davide S. Casali
 */

function getObj(name)
{
	if (document.getElementById)
	{
		this.obj = document.getElementById(name);
		this.style = document.getElementById(name).style;
	}
	else if (document.all)
	{
		this.obj = document.all[name];
		this.style = document.all[name].style;
	}
	else if (document.layers)
	{
		this.obj = document.layers[name];
		this.style = document.layers[name];
	}
}

function divScroller(id, direction, speed, delay)
{
	if (document.getElementById)
	{
		var scroller = new getObj(id);
		scroller.style.position = "relative";
		scroller.style.overflow = "hidden";
		scroller.obj.innerHTML = "<div id=\"" + id + "_inner\">" + scroller.obj.innerHTML + "</div>";

		var inner = new getObj(id + "_inner");
		inner.style.position = "absolute";
		inner.style.left = parseInt(scroller.style.width) + "px";
		inner.style.top = parseInt(scroller.style.height) + "px";

		if (direction == "h" || direction == "horizontal")
		{
			scroller.obj.onmouseover = function() { divScroll_onMouseOver(id); };
			scroller.obj.onmouseout = function() { divScroll_onMouseOut(id); };

			fxpatch = navigator.userAgent.indexOf("Firefox") > -1 ? " left: -9000px;" : "";
			spanContent = "<span id=\"" + id + "_widthEval\" style=\"visibility: hidden; position: absolute; top: -100px; left: -1px; z-index: -10; white-space: nowrap;" + fxpatch + "\"><nobr>" + inner.obj.innerHTML + "</nobr></span>";
			if (document.createElement)
			{
				var span = document.createElement('span');
				span.innerHTML = spanContent;
				scroller.obj.appendChild(span);
			}
			else
			{
				document.write(spanContent);
			}
			var widthEval = new getObj(id + "_widthEval");
			inner.style.top = "0px";
			inner.style.whiteSpace = "nowrap";
			inner.style.width = widthEval.obj.offsetWidth + "px";
			limit = parseInt(inner.style.width);
			setTimeout("divScrollHelperH(\"" + id + "\", " + limit + ", " + speed + ", " + delay + ")", parseInt(speed));
		}
		else if (direction == "v" || direction == "vertical")
		{
			inner.style.left = "0px";
			inner.style.width = parseInt(scroller.style.width) + "px";
			limit = inner.obj.getElementsByTagName('div').length * parseInt(scroller.style.height);
			setTimeout("divScrollHelperV(\"" + id + "\", " + limit + ", " + speed + ", " + delay + ")", parseInt(speed));
		}
	}
}

function divScrollHelperH(id, limit, speed, delay)
{
	if (document.getElementById)
	{
		var scroller = new getObj(id);
		var inner = new getObj(id + "_inner");
		nextTick = speed;
		if (!inner.style.left) inner.style.left = "0px";
		if (parseInt(inner.style.left) < -limit)
		{
			inner.style.left = parseInt(scroller.style.width) + "px";
		}
		else if (!scroller.obj.pause || scroller.obj.pause == false)
		{
			inner.style.left = (parseInt(inner.style.left) - 1) + "px";
		}
		setTimeout("divScrollHelperH(\"" + id + "\", " + limit + ", " + speed + ", " + delay + ")", parseInt(nextTick));
	}
}

function divScrollHelperV(id, limit, speed, delay)
{
	var scroller = new getObj(id);
	var inner = new getObj(id + "_inner");
	nextTick = speed;
	if (!inner.style.top) inner.style.top = "0px";
	
	if (parseInt(inner.style.top) < -limit)
	{
		inner.style.top = parseInt(scroller.style.height) + "px";
	}
	else
	{
		inner.style.top = (parseInt(inner.style.top) - 1) + "px";
	}

	if (!(parseInt(inner.style.top) == parseInt(scroller.style.height)) &&
		!(parseInt(inner.style.top) == -limit) &&
		(parseInt(inner.style.top) % parseInt(scroller.style.height)) == 0)
	{
		nextTick = delay;
	}

	setTimeout("divScrollHelperV(\"" + id + "\", " + limit + ", " + speed + ", " + delay + ")", parseInt(nextTick));
}

function divScroll_onMouseOver(id)
{
	var scroller = new getObj(id);
	scroller.obj.pause = true;
}

function divScroll_onMouseOut(id)
{
	var scroller = new getObj(id);
	scroller.obj.pause = false;
}

function divScrollItemsStyler(id, direction)
{
	var scroller = new getObj(id);
	var inner = new getObj(id + "_inner");
	
	elements = inner.obj.getElementsByTagName('div');
	
	for (var i = 0; i < elements.length; i++)
	{
		var item = elements.item(i);
		
		item.style.width = scroller.style.width;
	}
}