// Preload menu and rollover images
  im1= new Image(); im1.src="images/home_on.png";
  im1o= new Image(); im1o.src="images/home_off.png";
  im2= new Image(); im2.src="images/portrait_on.png";
  im2o= new Image(); im2o.src="images/portrait_off.png";
  im3= new Image(); im3.src="images/workshops_on.png";
  im3o= new Image(); im3o.src="images/workshops_off.png";
  im4= new Image(); im4.src="images/shows_on.png";
  im4o= new Image(); im4o.src="images/shows_off.png";
  im5= new Image(); im5.src="images/kontakt_on.png";
  im5o= new Image(); im5o.src="images/kontakt_off.png";
  im6= new Image(); im6.src="images/star_animation1.gif";
  im7= new Image(); im7.src="images/transparent.gif";
  im8= new Image(); im8.src="images/star_animation2.gif";
  im9= new Image(); im9.src="images/star_animation3.gif";
  im10= new Image(); im10.src="images/german_flag_on.png";
  im10o= new Image(); im10.src="images/german_flag_off.png";
  im11= new Image(); im10.src="images/english_flag_on.png";
  im11o= new Image(); im10.src="images/english_flag_off.png";
  im12= new Image(); im5.src="images/contact_on.png";
  im12o= new Image(); im5o.src="images/contact_off.png";
// Swap images for rollover, top+bottom menu bar
function imgSwap(oldImg)
{
   var strOver  = "_on";     // mouse over
   var strOff = "_off";      // mouse off
   var imgSrc = oldImg.src;  // image src
   var img2Id = oldImg.id;   // second image id

   if (img2Id.indexOf("2") != -1) {
       img2Id = img2Id.replace("2","");
   } else {
       img2Id = img2Id+"2"
   }

   img2Img = document.getElementById(img2Id)

   if (imgSrc.indexOf(strOver) != -1) {
       oldImg.src = imgSrc.replace(strOver,strOff);
       if (img2Img != null) { img2Img.src = imgSrc.replace(strOver,strOff); }
   } else {
       oldImg.src = imgSrc.replace(strOff,strOver);
       if (img2Img != null) {img2Img.src = imgSrc.replace(strOff,strOver); }
   }
}