function slide(src,link,text,target,attr) {
	this.src = src;
	this.link = link;
	this.text = text;
	this.target = target;
	this.attr = attr;

	if (document.images) {
		this.image = new Image();
	}

	this.loaded = false;
	
	this.load = function() {
		if (!document.images) { return; }
		
		if (!this.loaded) {
			this.image.src = this.src;
			this.loaded = true;
		}
	}

	this.hotlink = function() {
		var mywindow;
		
		if (!this.link) return;
		
		if (this.target) {
			if (this.attr) {
				mywindow = window.open(this.link, this.target, this.attr);
			} else {
				mywindow = window.open(this.link, this.target);
			}
			
			if (mywindow && mywindow.focus) mywindow.focus();
			
		} else {
			location.href = this.link;
		}
	}
}


function slideshow(slideshowname) {
	this.name = slideshowname;
	this.repeat = true;
	this.prefetch = -1;
	this.image;
	this.textid;
	this.textarea;
	this.timeout = 3000;
	this.slides = new Array();
	this.current = 0;
	this.timeoutid = 0;
	
	this.add_slide = function(slide) {
		var i = this.slides.length;
		
		if (this.prefetch == -1) {
			slide.load();
		}
	
		this.slides[i] = slide;
	}

  
	this.play = function(timeout) {
		this.pause();
		
		if (timeout) {
			this.timeout = timeout;
		}
		
		if (typeof this.slides[ this.current ].timeout != 'undefined') {
			timeout = this.slides[ this.current ].timeout;
		} else {
			timeout = this.timeout;
		}
	
		this.timeoutid = setTimeout( this.name + ".loop()", timeout);
	}

	this.pause = function() {
		if (this.timeoutid != 0) {
			clearTimeout(this.timeoutid);
			this.timeoutid = 0;
		}
	}

	this.update = function() {
		if (! this.valid_image()) { return; }
	
		if (typeof this.pre_update_hook == 'function') {
			this.pre_update_hook();
		}
	
		var slide = this.slides[ this.current ];
	
		var dofilter = false;
		
		if (this.image && typeof this.image.filters != 'undefined' && typeof this.image.filters[0] != 'undefined') {
			dofilter = true;
		}
	
		slide.load();
	
		if (dofilter) {
			if (slide.filter && this.image.style && this.image.style.filter) {
				this.image.style.filter = slide.filter;
			}
	
			this.image.filters[0].Apply();
		}

		this.image.src = slide.image.src;
		
		/*origWidth = slide.image.width;
		origHeight = slide.image.height;
		
		if(origWidth == 0 && origHeight == 0){
			//alert('image not loaded!');
			return;
		}
	
		if(origWidth <= maxWidth && origHeight <= maxHeight){
			// image is smaller than limits: use original size
			newWidth = origWidth;
			newHeight = origHeight;
		} else {
			// if image is the same width as height use max height (usually smaller)
			if(origHeight == origWidth){
				newWidth = maxHeight;
				newHeight = maxHeight;
			} else if(origHeight > origWidth){
				// image is portrait format, resize by max height
				newHeight = maxHeight;
				resizeRatio = newHeight / origHeight;
				newWidth = resizeRatio * origWidth;
				
				// if image is still too wide
				if(newWidth > maxWidth){
					resizeRatio = maxWidth / newWidth;
					newHeight = resizeRatio * newHeight;
					newWidth = maxWidth;
				}
			} else {
				// image is landscape format, resize by max width
				newWidth = maxWidth;
				resizeRatio = newWidth / origWidth;
				newHeight = resizeRatio * origHeight;
				
				// if image is still too wide
				if(newHeight > maxHeight){
					resizeRatio = maxHeight / newHeight;
					newWidth = resizeRatio * newWidth;
					newHeight = maxHeight;
				}
			}
		}
	
		this.image.width = Math.round(newWidth);
		this.image.height = Math.round(newHeight);
		*/
		//alert(this.image.width + ' x ' + this.image.height);
	
		if (dofilter) {
			this.image.filters[0].Play();
		}
		
		//this.display_text();
	
		if (typeof this.post_update_hook == 'function') {
			this.post_update_hook();
		}
	
		if (this.prefetch > 0) {
			var next, prev, count;
		
			// Pre-fetch the next slide image(s)
			next = this.current;
			prev = this.current;
			count = 0;
		do {
		
		// Get the next and previous slide number
		// Loop past the ends of the slideshow if necessary
		if (++next >= this.slides.length) next = 0;
		if (--prev < 0) prev = this.slides.length - 1;
		
		// Preload the slide image
		this.slides[next].load();
		this.slides[prev].load();
		
		// Keep going until we have fetched
		// the designated number of slides
		
		} while (++count < this.prefetch);
	}
}

this.goto_slide = function(n) {
	if (n == -1) {
		n = this.slides.length - 1;
	}
	
	if (n < this.slides.length && n >= 0) {
		this.current = n;
	}
	
	this.update();
}

this.goto_random_slide = function(include_current) {
	var i;

	if (this.slides.length > 1) {
		do {
		i = Math.floor(Math.random()*this.slides.length);
	} while (i == this.current);
		
		// Display the slide
		this.goto_slide(i);
	}
}


this.next = function() {
	if (this.current < this.slides.length - 1) {
		this.current++;
	} else if (this.repeat) {
		this.current = 0;
	}
	
	this.update();
}


this.previous = function() {
	if (this.current > 0) {
		this.current--;
	} else if (this.repeat) {
		this.current = this.slides.length - 1;
	}
	
	this.update();
}


  //--------------------------------------------------
  this.shuffle = function() {
    // This method randomly shuffles the order of the slides.

    var i, i2, slides_copy, slides_randomized;

    // Create a copy of the array containing the slides
    // in sequential order
    slides_copy = new Array();
    for (i = 0; i < this.slides.length; i++) {
      slides_copy[i] = this.slides[i];
    }

    // Create a new array to contain the slides in random order
    slides_randomized = new Array();

    // To populate the new array of slides in random order,
    // loop through the existing slides, picking a random
    // slide, removing it from the ordered list and adding it to
    // the random list.

    do {

      // Pick a random slide from those that remain
      i = Math.floor(Math.random()*slides_copy.length);

      // Add the slide to the end of the randomized array
      slides_randomized[ slides_randomized.length ] =
        slides_copy[i];

      // Remove the slide from the sequential array,
      // so it cannot be chosen again
      for (i2 = i + 1; i2 < slides_copy.length; i2++) {
        slides_copy[i2 - 1] = slides_copy[i2];
      }
      slides_copy.length--;

      // Keep going until we have removed all the slides

    } while (slides_copy.length);

    // Now set the slides to the randomized array
    this.slides = slides_randomized;
  }


  //--------------------------------------------------
  this.get_text = function() {
    // This method returns the text of the current slide
  
    return(this.slides[ this.current ].text);
  }


  //--------------------------------------------------
  this.get_all_text = function(before_slide, after_slide) {
    // Return the text for all of the slides.
    // For the text of each slide, add "before_slide" in front of the
    // text, and "after_slide" after the text.
    // For example:
    // document.write("<ul>");
    // document.write(s.get_all_text("<li>","\n"));
    // document.write("<\/ul>");
  
    all_text = "";
  
    // Loop through all the slides in the slideshow
    for (i=0; i < this.slides.length; i++) {
  
      slide = this.slides[i];
    
      if (slide.text) {
        all_text += before_slide + slide.text + after_slide;
      }
  
    }
  
    return(all_text);
  }


  //--------------------------------------------------
  this.display_text = function(text) {
    // Display the text for the current slide
  
    // If the "text" arg was not supplied (usually it isn't),
    // get the text from the slideshow
    if (!text) {
      text = this.slides[ this.current ].text;
    }
  	
	//alert(text);
	
    // If a textarea has been specified,
    // then change the text displayed in it
    if (this.textarea && typeof this.textarea.value != 'undefined') {
      this.textarea.value = text;
    }

    // If a text id has been specified,
    // then change the contents of the HTML element
    if (this.textid) {

      r = this.getElementById(this.textid);
	  
      if (!r) {
		  return false;
	  }
      if (typeof r.innerHTML == 'undefined') {
		  return false;
	  }
	
      if(text != ''){
	  	// Update the text
		r.style.display = 'block';
		//r.style.width = this.image.width;
		//r.style.top = (maxHeight / 2) + (this.image.height / 2) - 32;
		//r.style.left = (maxWidth / 2) - (this.image.width / 2);
     	r.innerHTML = text;
	  } else {
	   	 // hide text box
		 r.style.display = 'none';
	  }
    }
  }


  //--------------------------------------------------
  this.hotlink = function() {
    // This method calls the hotlink() method for the current slide.
  
    this.slides[ this.current ].hotlink();
  }


  //--------------------------------------------------
  this.save_position = function(cookiename) {
    // Saves the position of the slideshow in a cookie,
    // so when you return to this page, the position in the slideshow
    // won't be lost.
  
    if (!cookiename) {
      cookiename = this.name + '_slideshow';
    }
  
    document.cookie = cookiename + '=' + this.current;
  }


  //--------------------------------------------------
  this.restore_position = function(cookiename) {
  // If you previously called slideshow_save_position(),
  // returns the slideshow to the previous state.
  
    //Get cookie code by Shelley Powers
  
    if (!cookiename) {
      cookiename = this.name + '_slideshow';
    }
  
    var search = cookiename + "=";
  
    if (document.cookie.length > 0) {
      offset = document.cookie.indexOf(search);
      // if cookie exists
      if (offset != -1) { 
        offset += search.length;
        // set index of beginning of value
        end = document.cookie.indexOf(";", offset);
        // set index of end of cookie value
        if (end == -1) end = document.cookie.length;
        this.current = parseInt(unescape(document.cookie.substring(offset, end)));
        }
     }
  }


  //--------------------------------------------------
  this.noscript = function() {
    // This method is not for use as part of your slideshow,
    // but you can call it to get a plain HTML version of the slideshow
    // images and text.
    // You should copy the HTML and put it within a NOSCRIPT element, to
    // give non-javascript browsers access to your slideshow information.
    // This also ensures that your slideshow text and images are indexed
    // by search engines.
  
    $html = "\n";
  
    // Loop through all the slides in the slideshow
    for (i=0; i < this.slides.length; i++) {
  
      slide = this.slides[i];
  
      $html += '<P>';
  
      if (slide.link) {
        $html += '<a href="' + slide.link + '">';
      }
  
      $html += '<img src="../' + slide.src + '" ALT="slideshow image">';
  
      if (slide.link) {
        $html += "<\/a>";
      }
  
      if (slide.text) {
        $html += "<BR>\n" + slide.text;
      }
  
      $html += "<\/P>" + "\n\n";
    }
  
    // Make the HTML browser-safe
    $html = $html.replace(/\&/g, "&" );
    $html = $html.replace(/</g, "&lt;" );
    $html = $html.replace(/>/g, ">" );
  
    return('<pre>' + $html + '</pre>');
  }


  //==================================================
  // Private methods
  //==================================================

  //--------------------------------------------------
  this.loop = function() {
    // This method is for internal use only.
    // This method gets called automatically by a JavaScript timeout.
    // It advances to the next slide, then sets the next timeout.
    // If the next slide image has not completed loading yet,
    // then do not advance to the next slide yet.

    // Make sure the next slide image has finished loading
    if (this.current < this.slides.length - 1) {
      next_slide = this.slides[this.current + 1];
      if (next_slide.image.complete == null || next_slide.image.complete) {
        this.next();
      }
    } else { // we're at the last slide
      this.next();
    }
    
    // Keep playing the slideshow
    this.play( );
  }


  //--------------------------------------------------
  this.valid_image = function() {
    // Returns 1 if a valid image has been set for the slideshow
  
    if (!this.image)
    {
      return false;
    }
    else {
      return true;
    }
  }

  //--------------------------------------------------
  this.getElementById = function(element_id) {
    // This method returns the element corresponding to the id

    if (document.getElementById) {
      return document.getElementById(element_id);
    }
    else if (document.all) {
      return document.all[element_id];
    }
    else if (document.layers) {
      return document.layers[element_id];
    } else {
      return undefined;
    }
  }
  

  //==================================================
  // Deprecated methods
  // I don't recommend the use of the following methods,
  // but they are included for backward compatibility.
  // You can delete them if you don't need them.
  //==================================================

  //--------------------------------------------------
  this.set_image = function(imageobject) {
    // This method is deprecated; you should use
    // the following code instead:
    // s.image = document.images.myimagename;
    // s.update();

    if (!document.images)
      return;
    this.image = imageobject;
  }

  //--------------------------------------------------
  this.set_textarea = function(textareaobject) {
    // This method is deprecated; you should use
    // the following code instead:
    // s.textarea = document.form.textareaname;
    // s.update();

    this.textarea = textareaobject;
    this.display_text();
  }

  //--------------------------------------------------
  this.set_textid = function(textidstr) {
    // This method is deprecated; you should use
    // the following code instead:
    // s.textid = "mytextid";
    // s.update();

    this.textid = textidstr;
    this.display_text();
  }
}

function setDisplay(id,value) { 
	var elm = document.getElementById(id); 
	elm.style.display = value; 
}

function showObj(myObject){
	setDisplay(myObject,"block");
}

function hideObj(myObject){
	setDisplay(myObject,"none");
}