var scrInc = 10; // scroll increment in pixels
var tOut; // timeout used in scrollP() and stopScroll()
var tOutSpd = 1; // speed of the timeout in milliseconds

var tPos = 0; // starting position of the layer (only used in iex)

var nav = (document.layers) ? true : false;
var iex = (document.all) ? true : false;

if (iex) {var tWidth = 800}

//Scrolls layers in any direction (right, left, top, bottom (only in Netscape)
//Scrolls laft and right in IE

function scrollP(layID, dir) {
	
	var tOutString = "scrollP('" + layID + "','" + dir + "')"; // holds timeout instrcution

	if (nav) {
		var leftClip = document.layers[layID].clip.left;
		var rightClip = document.layers[layID].clip.right;
		var topClip = document.layers[layID].clip.top;
		var botClip = document.layers[layID].clip.bottom;

		if (dir == "left") {
			document.layers[layID].moveBy(-scrInc,0);
		
			document.layers[layID].clip.left = leftClip + scrInc;
			document.layers[layID].clip.right = rightClip + scrInc;
		
			tOut = setTimeout(tOutString, tOutSpd);
		}
	
		else if (dir == "right") {
			document.layers[layID].moveBy(scrInc,0);
		
			document.layers[layID].clip.left = leftClip - scrInc;
			document.layers[layID].clip.right = rightClip - scrInc;
		
			tOut = setTimeout(tOutString, tOutSpd);
		}

		else if (dir == "up") {
			document.layers[layID].moveBy(0,-scrInc);
		
			document.layers[layID].clip.top = topClip + scrInc;
			document.layers[layID].clip.bottom = botClip + scrInc;
		
			tOut = setTimeout(tOutString, tOutSpd);
		}
	
		else if (dir == "down") {
			document.layers[layID].moveBy(0,scrInc);
		
			document.layers[layID].clip.top = topClip - scrInc;
			document.layers[layID].clip.bottom = botClip - scrInc;
		
			tOut = setTimeout(tOutString, tOutSpd);
		}
	}
	
	else if (iex) {
	
		if (dir == "left") {
			document.all.mainLayer.style.left = tPos;
			tPos = tPos - scrInc;
			
			//document.all.mainLayer.style.width = tWidth;
			//tWidth = tWidth + scrInc;
			
			tOut = setTimeout(tOutString, tOutSpd);
		}
	
		else if (dir =="right") {
			document.all.mainLayer.style.left = tPos;
			tPos = tPos + scrInc;	
					
			//document.all.mainLayer.style.width = tWidth;
			//tWidth = tWidth - scrInc;
			
			tOut = setTimeout(tOutString, tOutSpd);
		}
	}

}

//clears timeout tOut
function stopScroll () {
	clearTimeout(tOut);
}