// ====================

// ==== Parameters ====

// ====================

var showIndex = new Boolean(true); 
// Enable index display

var indexSeparator = ' '; 
// String between index items

var showCaption = new Boolean(true); 
// Enable caption display

var preCache = new Boolean(true); 
// Activates pre-caching of next photo

var pictureID = 'photo'; 
// SPAN or DIV ID for photo

var captionID = 'caption'; 
// SPAN or DIV ID for caption

var indexID = 'index'; 
// SPAN or DIV ID for index

var wrapOn = new Boolean(true); 
// Wrapping from last photo to first and vice-versa

var slideMode = new Boolean(false); 
// Enables slideshow mode

var slideDelay = 10; 
// Default delay between slides inseconds

var clickMode = new Boolean(true); 
// Disable image clicking to advance

var imageALT = new Boolean(true); 
// Disable caption as image ALT tag text



// ==========================

// ==== Third Party Code ====

// ==========================






function createRequestObject() {
 FORM_DATA = new Object();
 

// The Object ("Array") where our data will be stored.
 
separator = ',';
 

// The token used to separate data from multi-select inputs
 
query = '' + this.location;
 
query = query.substring((query.indexOf('?')) + 1);
 

// Keep everything after the question mark '?'.
 
if (query.length < 1) { return false; }  

// Perhaps we got some bad data?
 
keypairs = new Object();
 
numKP = 1;
 
while (query.indexOf('&') > -1) {
  
keypairs[numKP] = query.substring(0,query.indexOf('&'));
  
query = query.substring((query.indexOf('&')) + 1);
  
numKP++;
 }
 
keypairs[numKP] = query;
 

for (i in keypairs) {
  
keyName = keypairs[i].substring(0,keypairs[i].indexOf('='));
  

// Left of '=' is name.
  
keyValue = keypairs[i].substring((keypairs[i].indexOf('=')) + 1);
  

// Right of '=' is value.
  
while (keyValue.indexOf('+') > -1) {
   
keyValue = keyValue.substring(0,keyValue.indexOf('+')) + ' ' + keyValue.substring(keyValue.indexOf('+') + 1);
   

// Replace each '+' in data string with a space.
  }
  
keyValue = unescape(keyValue);
  

// Unescape non-alphanumerics
  
if (FORM_DATA[keyName]) {
   
FORM_DATA[keyName] = FORM_DATA[keyName] + separator + keyValue;
  } 
else {
   
FORM_DATA[keyName] = keyValue;
  }
 }
 
return FORM_DATA;
}


FORM_DATA = createRequestObject();



// =============================

// ==== The heart of it all ====

// =============================



var glbCacheTimer;

var glbSlideTimer;



// Contains index of the current photo, initialized to the first photo (1)

var glbCurrentPhoto = 1;



// Array holding photo filenames

var photos = new Array ();



// Array holding photo captions

var captions = new Array ();



// Array holding link names

var linkNames = new Array ();



function getObjectByID(id) {
  
// Cross-browser function to return the object with the specific id

  

if (document.all) { 
// IE
    
return document.all[id];
  } 
else { 
// Netscape
    
return document.getElementById(id);
  }
}




function showPhoto(index) {
  
// Shows the photo with identified index
  
var theURL = "" + this.location;

  

// Strip parameters, if any present, from end of URL.
  
if (theURL.indexOf("?")>0) {
    theURL = theURL.substring(0,theURL.indexOf("?"));
  }

  

// Append the new photo index as a parameter.
  
theURL += "?photo=" + index;

  

// Append the slideshow mode as a parameter.
  
if (slideMode == true) {
  }
//theURL += "&slideMode=true";
    
//theURL += "&slideDelay=" + slideDelay;
  


// Go to the constructed URL which has the new
  
// photo's index as a parameter.
  
this.location = theURL;
}



function showNext() {
  
if (glbCurrentPhoto >= photos.length) {
    
if (wrapOn == true) {
      
glbCurrentPhoto = 1;
      
showPhoto (glbCurrentPhoto);
    }
  } 
else {
    
glbCurrentPhoto += 1;
    
showPhoto (glbCurrentPhoto);
  }
}



function showPrevious() {
  
if (glbCurrentPhoto <= 1) {
    
if (wrapOn == true) {
      
glbCurrentPhoto = photos.length;
      
showPhoto (glbCurrentPhoto);
    }
  } 
else {
    
glbCurrentPhoto += -1;
    
showPhoto (glbCurrentPhoto);
  }
}



function showFirst() {
	
glbCurrentPhoto = 1;
	
showPhoto (glbCurrentPhoto);
}



function showLast() {
	
glbCurrentPhoto = photos.length;
	
showPhoto (glbCurrentPhoto);
}



function initPhoto() {
  
// Display the photo
  
var photoLocation = getObjectByID(pictureID);
  
var imgString = '';

  
if (clickMode == true) {
imgString += "<a href='javascript:void(showNext());'>";}
  
imgString += "<img border='0' width='1040' height='475' id='mainImage' src='"+ photos[glbCurrentPhoto-1] +"'";
  

if (imageALT == true) {
imgString += ' alt="'+captions[glbCurrentPhoto-1].replace(/"/g,"'").replace(/<[^>]*>/g,"")+'"';}
  
imgString += ">";
  

if (clickMode == true) {
imgString += "</a>";}
  
photoLocation.innerHTML = imgString;

  

// Create caption if enabled.
  
if (showCaption == true) {
    
var photoCaption = getObjectByID(captionID);
    
photoCaption.innerHTML = captions[glbCurrentPhoto-1];
  }

  

// Build the index if enabled.
  
if (showIndex == true) {
buildIndex();}

  

// Pre-cache if enabled.
  
if ((preCache == true) && (glbCurrentPhoto < photos.length)) {
    

// Start timer for cache loader routine to check if main image is loaded
    
glbCacheTimer = setTimeout('cache(' + glbCurrentPhoto + ');', 500);
  }

  

// Slideshow mode, if enabled.
  
if (slideMode == true) {
    
glbSlideTimer = setTimeout('showNext();', (slideDelay * 1000));
  }
}



function cache(photoID) {
  

// Check to see if main image has loaded
  
if (getObjectByID('mainImage').complete) {
    
// Clear the timer
    
clearTimeout(glbCacheTimer);
    
// Load the next image.
    
getObjectByID('cache').src= photos[photoID];
  } 

else {
    
// Not loaded, so reset timer
    
glbCacheTimer = setTimeout('cache(' + glbCurrentPhoto + ');', 500);
  }
}



function addPhoto(filename, caption, linkName) {
  
// Add filenames and captions to their respective arrays.
  
var len = photos.length;
  
photos[len] = filename;
  
captions[len] = caption;
  

if (typeof linkName == "undefined") {
	
linkNames[len] = len + 1;
  } 
else {
	
linkNames[len] = linkName;
  }
}



function buildIndex() {


// Creates a clickable list of image numbers.
  
var indexString = '';
  
var i;

  
for (i = 1; i < photos.length+1; i++) {
    

// If not the first photo, add separator
    
if (i>1) {
indexString += indexSeparator}
    

if (i == glbCurrentPhoto) {
      
indexString += linkNames[i-1];
    } 
else { 
// Make all other numbers links
      
indexString += '<a href="javascript:void(showPhoto(' + i + '));">' + linkNames[i-1] + '</a>';
    }
  }
  

// Display the index
  
getObjectByID(indexID).innerHTML = indexString;
}


function enableSlideMode (newDelay) {
  

// Turns slide mode on
 
slideMode=Boolean(false);
  
if (newDelay > 0) {
    
slideDelay = newDelay;
  }
  

showPhoto(glbCurrentPhoto); 
//necessary to reset URL parameters.
//  

glbSlideTimer=setTimeout('showNext();',(slideDelay*1000));
}

function disableSlideMode() {
  
slideMode = Boolean(false);
  

clearTimeout (glbSlideTimer);
  
showPhoto(glbCurrentPhoto); 
}


//necessary to reset URL parameters.


// Get photo index from URL, if there is one, otherwise start at 1


if (FORM_DATA["photo"]>0) {
  
glbCurrentPhoto = Number(FORM_DATA["photo"]);
} 
else {
  
glbCurrentPhoto = 1;
}



// Get slide mode from URL, if there is one

if (FORM_DATA["slideMode"] == "true") {
  
slideMode = Boolean(true);
  

slideDelay = FORM_DATA["slideDelay"];
}