if (document.images)
   {
     pic1on= new Image(57,18);
     pic1on.src="../images/de-overknop-storvatt.gif";  
     pic2on= new Image(48,18);
     pic2on.src="../images/de-overknop-kinder.gif"; 
     pic3on= new Image(57,17);
     pic3on.src="../images/de-overknop-holz.gif"; 
     pic4on= new Image(116,17);
     pic4on.src="../images/de-overknop-wasser.gif"; 
     pic5on= new Image(140,18);
     pic5on.src="../images/de-overknop-aufbau.gif"; 
     pic6on= new Image(106,16);
     pic6on.src="../images/de-overknop-modelle.gif";
     pic7on= new Image(116,17);
     pic7on.src="../images/de-overknop-prufen.gif";
	 pic8on= new Image(143,17);
     pic8on.src="../images/de-overknop-fragen.gif";
     pic9on= new Image(91,17);
     pic9on.src="../images/de-overknop-messen.gif"; 
     pic10on= new Image(81,17);
     pic10on.src="../images/de-overknop-kunden.gif"; 
     pic11on= new Image(140,17);
     pic11on.src="../images/de-overknop-broschure.gif"; 
     pic12on= new Image(57,16);
     pic12on.src="../images/de-overknop-kontakt.gif"; 
     pic13on= new Image(13,13);
     pic13on.src="../images/overvlag-engels.gif"; 
     pic14on= new Image(13,13);
     pic14on.src="../images/overvlag-belgie.gif"; 
     pic15on= new Image(13,13);
     pic15on.src="../images/overvlag-duits.gif"; 
     pic16on= new Image(13,13);
     pic16on.src="../images/overvlag-frans.gif";
     pic17on= new Image(13,13);
     pic17on.src="../images/overvlag-nederlands.gif";
     pic18on= new Image(13,13);
     pic18on.src="../images/overvlag-spanje.gif";  

     pic1off= new Image(57,18);
     pic1off.src="../images/de-knop-storvatt.gif";
     pic2off= new Image(48,18);
     pic2off.src="../images/de-knop-kinder.gif";
     pic3off= new Image(57,17);
     pic3off.src="../images/de-knop-holz.gif";
     pic4off= new Image(116,17);
     pic4off.src="../images/de-knop-wasser.gif";
     pic5off= new Image(140,18);
     pic5off.src="../images/de-knop-aufbau.gif";
     pic6off= new Image(106,16);
     pic6off.src="../images/de-knop-modelle.gif";
     pic7off= new Image(116,17);
     pic7off.src="../images/de-knop-prufen.gif";
	 pic8off= new Image(143,17);
     pic8off.src="../images/de-knop-fragen.gif";
     pic9off= new Image(91,17);
     pic9off.src="../images/de-knop-messen.gif";
     pic10off= new Image(81,17);
     pic10off.src="../images/de-knop-kunden.gif";
     pic11off= new Image(140,17);
     pic11off.src="../images/de-knop-broschure.gif";
     pic12off= new Image(57,16);
     pic12off.src="../images/de-knop-kontakt.gif";
     pic13off= new Image(13,13);
     pic13off.src="../images/vlag-engels.gif"; 
     pic14off= new Image(13,13);
     pic14off.src="../images/vlag-belgie.gif"; 
     pic15off= new Image(13,13);
     pic15off.src="../images/vlag-duits.gif"; 
     pic16off= new Image(13,13);
     pic16off.src="../images/vlag-frans.gif";
     pic17off= new Image(13,13);
     pic17off.src="../images/vlag-nederlands.gif"; 
     pic18off= new Image(13,13);
     pic18off.src="../images/vlag-spanje.gif"; 
   }

function lightup(imgName)
 {
   if (document.images)
    {
      imgOn=eval(imgName + "on.src");
      document[imgName].src= imgOn;
    }
 }

function turnoff(imgName)
 {
   if (document.images)
    {
      imgOff=eval(imgName + "off.src");
      document[imgName].src= imgOff;
    }
 }