fValidVer =
  (((navigator.appName == "Netscape") &&
  (parseInt(navigator.appVersion) >= 3 )) ||
  ((navigator.appName == "Microsoft Internet Explorer") &&
  (parseInt(navigator.appVersion) >= 4 )));

if (document.images) {
	var algemeen_normal = new Image;
	algemeen_normal.src = "../buttons/algemeen_normal_button.jpg";

	var algemeen_hover = new Image;
	algemeen_hover.src = "../buttons/algemeen_hover_button.jpg";

	var algemeen_click = new Image;
	algemeen_click.src = "../buttons/algemeen_click_button.jpg";

	var geschied_normal = new Image;
	geschied_normal.src = "../buttons/geschied_normal_button.jpg";

	var geschied_hover = new Image;
	geschied_hover.src = "../buttons/geschied_hover_button.jpg";

	var geschied_click = new Image;
	geschied_click.src = "../buttons/geschied_click_button.jpg";

	var data_normal = new Image;
	data_normal.src = "../buttons/data_normal_button.gif";

	var data_hover = new Image;
	data_hover.src = "../buttons/data_hover_button.gif";

	var data_click = new Image;
	data_click.src = "../buttons/data_click_button.gif";

	var volkslied_normal = new Image;
	volkslied_normal.src = "../buttons/volkslied_normal_button.jpg";

	var volkslied_hover = new Image;
	volkslied_hover.src = "../buttons/volkslied_hover_button.jpg";

	var volkslied_click = new Image;
	volkslied_click.src = "../buttons/volkslied_click_button.jpg";

    var andere_normal = new Image;
	andere_normal.src = "../buttons/andere_normal_button.jpg";

	var andere_hover = new Image;
	andere_hover.src = "../buttons/andere_hover_button.jpg";

	var andere_click = new Image;
	andere_click.src = "../buttons/andere_click_button.jpg";

	var surindex_normal = new Image;
	surindex_normal.src = "../buttons/surindex_normal_button.gif";

	var surindex_hover = new Image;
	surindex_hover.src = "../buttons/surindex_hover_button.gif";

	var surindex_click = new Image;
	surindex_click.src = "../buttons/surindex_click_button.gif";

	var surilinks_normal = new Image;
	surilinks_normal.src = "../buttons/surilinks_normal_button.gif";

	var surilinks_hover = new Image;
	surilinks_hover.src = "../buttons/surilinks_hover_button.gif";

	var surilinks_click = new Image;
	surilinks_click.src = "../buttons/surilinks_click_button.gif";

	var suripics_normal = new Image;
	suripics_normal.src = "../buttons/suripics_normal_button.jpg";

	var suripics_hover = new Image;
	suripics_hover.src = "../buttons/suripics_hover_button.jpg";

	var suripics_click = new Image;
	suripics_click.src = "../buttons/suripics_click_button.jpg";
	
	var peter_normal = new Image;
	peter_normal.src = "../buttons/peter_normal_button.gif";

	var peter_hover = new Image;
	peter_hover.src = "../buttons/peter_hover_button.gif";

	var peter_click = new Image;
	peter_click.src = "../buttons/peter_click_button.gif";

    var survey_normal = new Image;
	survey_normal.src = "../buttons/survey_normal_button.gif";

	var survey_hover = new Image;
	survey_hover.src = "../buttons/survey_hover_button.gif";

	var survey_click = new Image;
	survey_click.src = "../buttons/survey_click_button.gif";

    var troon_normal = new Image;
	troon_normal.src = "../buttons/troon_normal_button.gif";

	var troon_hover = new Image;
	troon_hover.src = "../buttons/troon_hover_button.gif";

	var troon_click = new Image;
	troon_click.src = "../buttons/troon_click_button.gif";        

    var geo_normal = new Image;
	geo_normal.src = "../buttons/geo_normal_button.gif";

    var geo_hover = new Image;
	geo_hover.src = "../buttons/geo_hover_button.gif";

	var geo_click = new Image;
	geo_click.src = "../buttons/geo_click_button.gif";

	var en_normal = new Image;
	en_normal.src = "../buttons/en_normal_button.jpg";

    var en_hover = new Image;
	en_hover.src = "../buttons/en_hover_button.jpg";

	var en_click = new Image;
	en_click.src = "../buttons/en_click_button.jpg";
}

function Swap(image1, image2) {
  if (document.images)
  	document.images[image1].src = eval(image2 + ".src");
}