// functies voor preloading van images

function preloadImage(src){
	if (document.images){
		n = imageArray.length;		
		imageArray[n] = new Image();
		imageArray[n].src = src;
   }
}
	
function loadAll_old(){  
	if (document.images){
	imageArray = new Array();
		for(var n = 0; n < document.images.length; n++){
		    // als de naam van de image begint met tab dan preloaden			
			if (document.images[n].src.indexOf("_up.") != -1) 
				preloadImage(document.images[n].src.replace("_up.","_over."));
		}
	}
}

// functies voor swapping van images
function swapOver(theName){
	if (navigator.appVersion.indexOf("3")==0) return;
  if (document.images){
    if(document.layers) theImage = document.images[theName];
    else theImage = document.images[theName];
	if (theImage.src.indexOf("_over.")==-1)
	  theImage.src = theImage.src.replace("_up.","_over.");	  
  }
}

function swapOut(theName){
  if (navigator.appVersion.indexOf("3")==0) return;
  if (document.images){
    if(document.layers) theImage = document.images[theName];
    else theImage = document.images[theName];
	if (theImage.src.indexOf("_up.")==-1)
		theImage.src = theImage.src.replace("_over.","_up.");	
  }
}