var aktion, check;
check = 1;

function Slide (aktion) {

   if(aktion == 1) {
   	check++;
      if (check >= 44) {check = 43};
   }

   else {
   	check--;
      if (check <= 0) {check = 1};
   }

   document.images.slide.src = "res/slideshow/1_"+check+".jpg";
}