function changeImage(imgID)
{
  if (imgID == 'home') {
  	 document.images["homebutton"].src= "images/home_clicked.gif";
}
  if (imgID == 'uitslagen') {
  	 document.images["uitslagenbutton"].src= "images/uitslagen_clicked.gif";
}
  if (imgID == 'agenda') {
  	 document.images["agendabutton"].src= "images/agenda_clicked.gif";
}
  if (imgID == 'training') {
  	 document.images["trainingbutton"].src= "images/training_clicked.gif";
}
  if (imgID == 'contact') {
  	 document.images["contactbutton"].src= "images/contact_clicked.gif";
}
return true;
}
function changeImageBack(imgID)
{
 	if (imgID == 'home') {
 		 document.images["homebutton"].src = "images/home.gif";
 		 }
 	if (imgID == 'uitslagen') {
 		 document.images["uitslagenbutton"].src = "images/uitslagen.gif";
 		 }
 	if (imgID == 'agenda') {
 		 document.images["agendabutton"].src = "images/agenda.gif";
 		 }
 	if (imgID == 'training') {
 		 document.images["trainingbutton"].src = "images/training.gif";
 		 }
 	if (imgID == 'contact') {
 		 document.images["contactbutton"].src = "images/contact.gif";
 		 }		 
 return true;
}