var TRANSITION_SLIDE_TIME = 500;         //In milliseconds


var PAUSE_SLIDE_TIME = 2000;              //In milliseconds





var timer;


var timerPeriod = TRANSITION_SLIDE_TIME / 100;


var counter = 0;


var showslideFlag = true;


var image_list = new Array();


var preload_list = new Array();





// put images to preload in this array


totImages = 5;
  preload_list[0] = "BORD.JPG";  preload_list[1] = "BORD2.JPG";  preload_list[2] = "FRAMSIDA.JPG";
  preload_list[3] = "KYLDISK.JPG";  preload_list[4] = "PASTA.GIF";





var path_to_images = "Images/Slideshow/";





// preload (change path to images if necessary)


function startSlideshow(backgroundImageID) {


  if (document.images) {


    for (var preload_counter=0; preload_counter<preload_list.length; preload_counter++) {


      image_list[preload_counter] = new Image();


      image_list[preload_counter].src = path_to_images + preload_list[preload_counter];


    }


    nextSlide(backgroundImageID);


  }


}





function changeSlide(backgroundImageID) {


  randomImage = Math.floor((totImages-1)*Math.random());


  document.getElementById(backgroundImageID).style.backgroundImage = "url(" + image_list[randomImage].src + ")";


}





function nextSlide(backgroundImageID) {


  if(showslideFlag) {counter++;}


  else {if(counter == 100) {timerPeriod = TRANSITION_SLIDE_TIME / 100;}counter--;}





  changeOpac(counter, backgroundImageID);





  if(counter == 100) {timerPeriod = PAUSE_SLIDE_TIME; showslideFlag = false;}





  if(counter == 0) {changeSlide(backgroundImageID); showslideFlag = true;}





  timer = setTimeout("nextSlide('" + backgroundImageID + "')",timerPeriod);


}





function quitSlideshow() {clearTimeout(timer);}





//change the opacity for different browsers


function changeOpac(opacity, id) {


    var object = document.getElementById(id).style;


    object.opacity = (opacity / 100);


    object.MozOpacity = (opacity / 100);


    object.KhtmlOpacity = (opacity / 100);


    object.filter = "alpha(opacity=" + opacity + ")";


}