function tikker() 
	{
		if(IE) 
		{ 
			diffY = document.body.scrollTop; 
			if (diffY < 15)
				diffY = 15;
			diffX = document.body.scrollLeft; 
		}
		if(NS) 
		{ 
			diffY = self.pageYOffset; 
			diffX = self.pageXOffset; 
		}
		if(diffY != lastScrollY) 
		{
			percent = .1 * (diffY - lastScrollY);
			if(percent > 0) 
				percent = Math.ceil(percent);
			else 
				percent = Math.floor(percent);
			if(IE) 
				document.all.drijver.style.pixelTop += percent;
			if(NS) 
				document.drijver.top += percent;
			lastScrollY = lastScrollY + percent;
		}
		if(diffX != lastScrollX) 
		{
			percent = .1 * (diffX - lastScrollX);
			if(percent > 0) 
				percent = Math.ceil(percent);
			else 
				percent = Math.floor(percent);
			if(IE) 
				document.all.drijver.style.pixelLeft += percent;
			if(NS) 
				document.drijver.left += percent;
			lastScrollX = lastScrollX + percent;
		}
	}

	function checkFocus(x,y) 
	{
		plaatjex = document.drijver.pageX;
		plaatjey = document.drijver.pageY;
		plaatjewidth = document.drijver.clip.width;
		plaatjeheight = document.drijver.clip.height;
		if( (x > plaatjex && x < (plaatjex+plaatjewidth)) && (y > plaatjey && y < (plaatjey+plaatjeheight))) 
			return true;
		else 
			return false;
	}

	function oppakken(e) 
	{
		if(IE) 
		{
			whichIt = event.srcElement;
			while (whichIt.id.indexOf("drijver") == -1) 
			{
				whichIt = whichIt.parentElement;
				if (whichIt == null) 
				{ 
					return true; 
				}
			}
			whichIt.style.pixelLeft = whichIt.offsetLeft;
			whichIt.style.pixelTop = whichIt.offsetTop;
			currentX = (event.clientX + document.body.scrollLeft);
	 		currentY = (event.clientY + document.body.scrollTop);
		} 
		else 
		{
			window.captureEvents(Event.MOUSEMOVE);
			if(checkFocus (e.pageX,e.pageY)) 
			{
				whichIt = document.drijver;
				PlaatjeRaaktX = e.pageX-document.drijver.pageX;
				PlaatjeRaaktY = e.pageY-document.drijver.pageY;
			}
		}
		return true;
	}

	function verplaatsen(e) 
	{
		if (whichIt == null) 
		{ 
			return false; 
		}
		if(IE) 
		{
			newX = (event.clientX + document.body.scrollLeft);
			newY = (event.clientY + document.body.scrollTop);
			distanceX = (newX - currentX);distanceY = (newY - currentY);
			currentX = newX;currentY = newY;
			whichIt.style.pixelLeft += distanceX;
			whichIt.style.pixelTop += distanceY;
			if(whichIt.style.pixelTop < document.body.scrollTop) 
				whichIt.style.pixelTop = document.body.scrollTop;
			if(whichIt.style.pixelLeft < document.body.scrollLeft) 
				whichIt.style.pixelLeft = document.body.scrollLeft;
			if(whichIt.style.pixelLeft > document.body.offsetWidth - document.body.scrollLeft - whichIt.style.pixelWidth - 20) 
				whichIt.style.pixelLeft = document.body.offsetWidth - whichIt.style.pixelWidth - 20;
			if(whichIt.style.pixelTop > document.body.offsetHeight + document.body.scrollTop - whichIt.style.pixelHeight - 5) 
				whichIt.style.pixelTop = document.body.offsetHeight + document.body.scrollTop - whichIt.style.pixelHeight - 5;
			event.returnValue = false;
		} 
		else 
		{
			whichIt.moveTo(e.pageX-PlaatjeRaaktX,e.pageY-PlaatjeRaaktY);
			if(whichIt.left < 0+self.pageXOffset) 
				whichIt.left = 0+self.pageXOffset;
			if(whichIt.top < 0+self.pageYOffset) 
				whichIt.top = 0+self.pageYOffset;
			if( (whichIt.left + whichIt.clip.width) >= (window.innerWidth+self.pageXOffset-17)) 
				whichIt.left = ((window.innerWidth+self.pageXOffset)-whichIt.clip.width)-17;
			if( (whichIt.top + whichIt.clip.height) >= (window.innerHeight+self.pageYOffset-17)) 
				whichIt.top = ((window.innerHeight+self.pageYOffset)-whichIt.clip.height)-17;
			return false;
		}
		return false;
	}

	function neerzetten() 
	{
		whichIt = null;
		if(NS) 
			window.releaseEvents (Event.MOUSEMOVE);
		return true;
	}