//Preloaded slideshow script- By Jason Moon
//For this script and more
//Visit http://www.dynamicdrive.com

// the image array is defined within the page code itself...


function CacheImage(ImageSource) { // TURNS THE STRING INTO AN IMAGE OBJECT
   var ImageObject = new Image();
   ImageObject.src = ImageSource;
   return ImageObject;
}

function ShowSlide(Direction) {
   if (SlideReady) {
      NextSlide = CurrentSlide + Direction;
      // THIS WILL DISABLE THE BUTTONS (IE-ONLY)
      //document.getElementById("scrollLeft").disabled = (NextSlide == 0);
      //document.getElementById("scrollRight").disabled = (NextSlide == (Slides.length-1));   
 
      //alert(NextSlide)
      
 if(NextSlide <= 0) {
		
		document.getElementById("scrollLeft").src = "images/scrollLeft_On.jpg"
		document.getElementById("scrollLeft").style.cursor = "default"
   		document.getElementById("scrollLeft").onmouseover = function() {
	 		
	 		noFadeImage(document.getElementById("scrollLeft"))
 		}
 	}
  
  else
  
 {      	
		document.getElementById("scrollLeft").src = "images/scrollLeft_Off.jpg"
		document.getElementById("scrollLeft").style.cursor = "pointer"	 
 		document.getElementById("scrollLeft").onmouseover = function() {
	 		
	 		fadeImage(document.getElementById("scrollLeft"))
 		}
 		
 		document.getElementById("scrollLeft").onmouseout = function() {
	 		
	 		noFadeImage(document.getElementById("scrollLeft"))
 		}		
}
 
  if(NextSlide >= (Slides.length -1)) {
      
		document.getElementById("scrollRight").src = "images/scrollRight_On.jpg"
		document.getElementById("scrollRight").style.cursor = "default"
		
		document.getElementById("scrollRight").onmouseover = function() {
	 		
	 		noFadeImage(document.getElementById("scrollRight"))
 		}		
  }
  
  else
  
 {      
		document.getElementById("scrollRight").src = "images/scrollRight_Off.jpg"
		document.getElementById("scrollRight").style.cursor = "pointer"	
		
		document.getElementById("scrollRight").onmouseover = function() {
	 		
	 		fadeImage(document.getElementById("scrollRight"))
 		}
 		
 		document.getElementById("scrollRight").onmouseout = function() {
	 		
	 		noFadeImage(document.getElementById("scrollRight"))
 		}				
		
		 
 }
 
      
 if ((NextSlide >= 0) && (NextSlide < Slides.length)) {
            document.images['Screen'].src = Slides[NextSlide].src;
            //alert(Captions[NextSlide])
            
            if (Captions[NextSlide] != ""){
            
	            document.getElementById("articleCaption").firstChild.firstChild.nodeValue = Captions[NextSlide];
        	}
        	
            //alert(document.getElementById("articleCaption").firstChild.nodeName);
            CurrentSlide = NextSlide++;
            Message = 'Picture ' + (CurrentSlide+1) + ' of ' + Slides.length;
            self.defaultStatus = Message;
            if (Direction == 1) CacheNextSlide();
      }
         return false;

   }
}

function Download() {
   if (Slides[NextSlide].complete) {
      SlideReady = true;
      self.defaultStatus = Message;
   }
   else setTimeout("Download()", 100); // CHECKS DOWNLOAD STATUS EVERY 100 MS
   return true;
}

function CacheNextSlide() {
   if ((NextSlide < Slides.length) && (typeof Slides[NextSlide] == 'string'))
{ // ONLY CACHES THE IMAGES ONCE
      SlideReady = false;
      self.defaultStatus = 'Downloading next picture...';
      Slides[NextSlide] = CacheImage(Slides[NextSlide]);
      Download();
   }
   return true;
}

function StartUserSlideShow() {

	if (!document.getElementById) return false;
	if (!document.getElementById("userSlideShow")) return false;
 

   CurrentSlide = -1;
   Slides[0] = CacheImage(Slides[0]);
   SlideReady = true;
   ShowSlide(1);
}