if (document.images) {
  var bu01_1 = new Image() 
  bu01_1.src = "/images/buttonNL_o.gif"
  var bu01_0 = new Image() 
  bu01_0.src = "/images/buttonNL.gif"
  var bu02_1 = new Image() 
  bu02_1.src = "/images/buttonEN_o.gif"
  var bu02_0 = new Image() 
  bu02_0.src = "/images/buttonEN.gif"
  var bu03_1 = new Image() 
  bu03_1.src = "/images/buttonFR_o.gif"
  var bu03_0 = new Image() 
  bu03_0.src = "/images/buttonFR.gif"
}

function act(imgName) 
{
  if (document.images){
	document[imgName].src = eval(imgName + '1.src');
	}
}

function inact(imgName) {
  if (document.images)
    {document[imgName].src = eval(imgName + '0.src')}
}