function rollOver(imageName, menuImageFile){
		if(parseInt(navigator.appVersion)>=4){
				document.images[imageName].src = menuImageFile;
		}
}
function swap(imageName){
		document.images['afbeelding'].src = imageName;
}

function change(picture) {
document.vergroting.src = picture
}

function toggleLayer( whichLayer, widthTekst ){			
	  
	var elem, vis;	
	if( document.getElementById ){
		elem = document.getElementById( whichLayer );
	}else if( document.all ){
		elem = document.all[whichLayer];
  }else if( document.layers ){
	  elem = document.layers[whichLayer];
	 }
	 	vis = elem.style;	
  if(vis.display==''&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined){  	
	 	vis.display = (elem.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none';
	 	if(elem.offsetWidth!=0&&elem.offsetHeight!=0){
	 		document.getElementById('content').style.width = parseFloat(document.getElementById('content').style.width) - widthTekst;
	 	}else{
	 		document.getElementById('content').style.width = parseFloat(document.getElementById('content').style.width) + widthTekst;
	 	}
	}else{
	 	vis.display = (vis.display==''||vis.display=='block')?'none':'block';
	 	if(vis.display=='none'){
	 		document.getElementById('content').style.width = parseFloat(document.getElementById('content').style.width) - widthTekst;
	 	}else{
	 		document.getElementById('content').style.width = parseFloat(document.getElementById('content').style.width) + widthTekst;
	 	}
	}
	
	scroller.docW = document.getElementById("content").offsetWidth;
  scroller.contW = document.getElementById("container").offsetWidth;
  scroller.scrollAreaW = document.getElementById("scrollArea").offsetWidth;
      
  scroller.scrollW = (scroller.contW * scroller.scrollAreaW) / scroller.docW;
  if(scroller.scrollW < 65) scroller.scrollW = 65;
   document.getElementById("scroller").style.width = Math.round(scroller.scrollW) + "px";
   scroller.scrollDist = Math.round(scroller.scrollAreaW-scroller.scrollW);
   Drag.init(document.getElementById("scroller"),null,0,scroller.scrollDist,0,0);
   document.getElementById("scroller").onDrag = function (x,y) {
   var scrollX = parseInt(document.getElementById("scroller").style.left);
   var docX = 0 - (scrollX * (scroller.docW - scroller.contW) / scroller.scrollDist);
   document.getElementById("content").style.left = docX + "px";
  }
}