<!--

var dom        = document.getElementById ? true:false;
var nn4        = document.layers ? true:false;
var ie4        = document.all ? true:false;
var upW        = 21;    // Width of up-arrow
var upH        = 21;    // Height of up-arrow
var downW      = 21;    // Width of down-arrow
var downH      = 21;    // Height of down-arrow
var dragW      = 9;     // Width of scrollbar
var dragH      = 45;    // Height of scrollbar
var scrollH    = 155;   // Height of scrollbar
var speed      = 7;     // Scroll speed
var mouseX;
var mouseY;
var clickUp    = false; // If click on up-arrow
var clickDown  = false; // If click on down-arrow
var clickDrag  = false; // If click on scrollbar
var clickAbove = false; // If click above scrollbar
var clickBelow = false; // If click below scrollbar
var timer      = setTimeout('',500); // Repeat variable
var upL;
var upT;
var downL;
var downT;
var dragL;
var dragT;
var rulerL;
var rulerT;
var contentT;
var contentH;
var contentClipH;
var scrollLength;
var startY;

function down(e){
	if((document.layers && e.which!=1) || (document.all && event.button!=1)) return true; // Enables the right mousebutton
	getMouse(e);
	startY = (mouseY - dragT);
	if(mouseX >= upL && (mouseX <= (upL + upW)) && mouseY >= upT && (mouseY <= (upT + upH))){ // bei klick auf Pfeilplus
		clickUp = true;
		return scrollUp();
	}
	else if(mouseX >= downL && (mouseX <= (downL + downW)) && mouseY >= downT && (mouseY <= (downT + downH))){ // beim klick auf Pfeilminus
		clickDown = true;
		return scrollDown();
	}
	else if(mouseX >= dragL && (mouseX <= (dragL + dragW)) && mouseY >= dragT && (mouseY <= (dragT + dragH))){ // beim klick auf Scroller
		clickDrag = true;
		return false;
	}
	else if(mouseX >= dragL && (mouseX <= (dragL + dragW)) && mouseY >= rulerT && (mouseY <= (rulerT + scrollH))){
		if(mouseY < dragT){ // If click above drag
			clickAbove = true;
			clickUp = true;
			return scrollUp();
		}
		else{ // beim klick auf Scrollspur
			clickBelow = true;
			clickDown = true;
			return scrollDown();
		}
	}
	else{return true;} // no scroll dann position
}

function move(e){ // Scroller
	if(clickDrag && contentH > contentClipH){
		getMouse(e);
		dragT = (mouseY - startY);
		if(dragT < (rulerT))
			dragT = rulerT;
		if(dragT > (rulerT + scrollH - dragH))
			dragT = (rulerT + scrollH - dragH);
		contentT = ((dragT - rulerT)*(1/scrollLength));
		contentT = eval('-' + contentT);
		moveTo();
		if(ie4) // So ie-pc doesn't select gifs
			return false;
	}
}

function up(){
	clearTimeout(timer);
	clickUp    = false;
	clickDown  = false;
	clickDrag  = false;
	clickAbove = false;
	clickBelow = false;
	return true;
}

function getT(){ // Reads content layer top
	if(ie4)
		contentT = document.all.content.style.pixelTop;
	else if(nn4)
		contentT = document.contentClip.document.content.top;
	else if(dom)
		contentT = parseInt(document.getElementById("content").style.top);
}

function getMouse(e){ // Reads mouse X and Y coordinates
	if(ie4){
		mouseY = event.clientY + document.body.scrollTop;
		mouseX = event.clientX + document.body.scrollLeft;
	}
	else if(nn4 || dom){
		mouseY = e.pageY;
		mouseX = e.pageX;
	}
}

function moveTo(){ // Moves the layer
	if(ie4){
		document.all.content.style.top = contentT;
		document.all.ruler.style.top   = dragT;
		document.all.drag.style.top    = dragT;
	}
	else if(nn4){
		document.contentClip.document.content.top = contentT;
		document.ruler.top = dragT;
		document.drag.top  = dragT;
	}
	else if(dom){
		document.getElementById("content").style.top = contentT + "px";
		document.getElementById("drag").style.top    = dragT + "px";
		document.getElementById("ruler").style.top   = dragT + "px";
	}
}

function scrollUp(){ // Scrolls up
	getT();
	if(clickAbove){
		if(dragT <= (mouseY-(dragH/2)))
			return up();
	}
	if(clickUp){
		if(contentT < 0){
			dragT = dragT - (speed*scrollLength);
			if(dragT < (rulerT))
				dragT = rulerT;
			contentT = contentT + speed;
			if(contentT > 0)
				contentT = 0;
			moveTo();
			timer = setTimeout("scrollUp()",25);
		}
	}
	return false;
}

function scrollDown(){ // Scrolls down
	getT();
	if(clickBelow){
		if(dragT >= (mouseY-(dragH/2)))
			return up();
	}
	if(clickDown){
		if(contentT > -(contentH - contentClipH)){
			dragT = dragT + (speed*scrollLength);
			if(dragT > (rulerT + scrollH - dragH))
				dragT = (rulerT + scrollH - dragH);
			contentT = contentT - speed;
			if(contentT < -(contentH - contentClipH))
				contentT = -(contentH - contentClipH);
			moveTo();
			timer = setTimeout("scrollDown()",25);
		}
	}
	return false;
}

function reloadPage(){location.reload();} // reloads page to position the layers again

function init(){ // Preload
	if(ie4){
		// Up-arrow X and Y variables
		upL          = document.all.up.style.pixelLeft;
		upT          = document.all.up.style.pixelTop;
		// Down-arrow X and Y variables
		downL        = document.all.down.style.pixelLeft;
		downT        = document.all.down.style.pixelTop;
		// Scrollbar X and Y variables
		dragL        = document.all.drag.style.pixelLeft;
		dragT        = document.all.drag.style.pixelTop;
		// Ruler Y variable
		rulerT       = document.all.ruler.style.pixelTop;
		// Height of content layer and clip layer
		contentH     = parseInt(document.all.content.scrollHeight);
		contentClipH = parseInt(document.all.contentClip.style.height);
	}
	else if(nn4){
		// Up-arrow X and Y variables
		upL          = document.up.left;
		upT          = document.up.top;
		// Down-arrow X and Y variables
		downL        = document.down.left;
		downT        = document.down.top;
		// Scrollbar X and Y variables
		dragL        = document.drag.left;
		dragT        = document.drag.top;
		// Ruler Y variable
		rulerT       = document.ruler.top;
		// Height of content layer and clip layer
		contentH     = document.contentClip.document.content.clip.bottom;
		contentClipH = document.contentClip.clip.bottom;
	}
	else if(dom){
		// Up-arrow X and Y variables
		upL          = parseInt(document.getElementById("up").style.left);
		upT          = parseInt(document.getElementById("up").style.top);
		// Down-arrow X and Y variables
		downL        = parseInt(document.getElementById("down").style.left);
		downT        = parseInt(document.getElementById("down").style.top);
		// Scrollbar X and Y variables
		dragL        = parseInt(document.getElementById("drag").style.left);
		dragT        = parseInt(document.getElementById("drag").style.top);
		// Ruler Y variable
		rulerT       = parseInt(document.getElementById("ruler").style.top);
		// Height of content layer and clip layer
		contentH     = parseInt(document.getElementById("content").offsetHeight);
		contentClipH = parseInt(document.getElementById("contentClip").offsetHeight);
		document.getElementById("content").style.top = 0 + "px";
	}
	scrollLength = ((scrollH-dragH)/(contentH-contentClipH)); // Number of pixels scrollbar should move
	if(nn4){ // Initializes event capturing
		document.captureEvents(Event.MOUSEDOWN | Event.MOUSEMOVE | Event.MOUSEUP);
		window.onresize = reloadPage;
	}
	document.onmousedown = down;
	document.onmousemove = move;
	document.onmouseup   = up;
}

//-->