<!--
// PRELOAD IMAGES
if (document.images) {
	
	buttons = new Array("at","waar","wat","wie","wanneer");
	
	for(button in buttons){
		
		varname = buttons[button];
		
		document[varname+"_normal"] = new Image();
		document[varname+"_normal"].src = "images/but_"+varname+".jpg";
		document[varname+"_hover"] = new Image();
		document[varname+"_hover"].src = "images/but_"+varname+"_hover.jpg";
	
	}

}
// FUNCTIONS

function buttondown(buttonname){
	
    if (document.images) {		
      	document[buttonname].src = document[buttonname+"_hover"].src;	
    }
	
}
function buttonup (buttonname){
	
    if (document.images) {
      	document[buttonname].src = document[buttonname+"_normal"].src;
    }
	
}
// -->