var dir = "images/";
var images = Array();
  
images=[

  ['vogels', 'Vogels.png', 'rollover_Vogels.png'],
  ['macro', 'Macro.png', 'rollover_Macro.png'],
  ['zoogdieren', 'Zoogdieren.png', 'rollover_Zoogdieren.png'],
  ['landschap', 'Landschap.png', 'rollover_Landschap.png']
];

for(i = 0; i < images.length; i++) 
{
 	eval(images[i]['0']+" = new Image();");
 	eval(images[i]['0']+".src = '"+dir+images[i]['1']+"';");
 	eval(images[i]['0']+"Over = new Image();");
 	eval(images[i]['0']+"Over.src = '"+dir+images[i]['2']+"';");
}
  
function rollOver(imgName) 
{
	if(document.images) 
 	{
   		imgOver = eval(imgName + "Over.src");
   		document[imgName].src = imgOver;
 	}
}
		   
function rollOut(imgName) 
{
 	if(document.images) 
 	{
   		imgOut = eval(imgName + ".src");
   		document[imgName].src = imgOut;
 	}
}