/*

======= Photo Viewer 2.30 ========

==== Created by Josh Freedman ====

====  Web 1 Marketing, Inc.   ====

====   Copyright (C) 2005     ====

====   All rights reserved.   ====

====  www.web1marketing.com   ====

==================================



Use of these scripts is free so long as you include proper

attribution (the block above) and a link from your site to

www.web1marketing.com.



Use these scripts at your own risk. The author assumes no

responsibility for support or for consequences of their use.



Comments and suggestions welcome: www.joshfreedman.com.



IT IS HIGHLY RECOMMENDED THAT NO CHANGES BE MADE TO THIS FILE AND

THAT ALL PARAMETER VALUES BE CUSTOMIZED IN THE PHOTO_LIST.JS FILES.



==== Version Notes ====

Version 2.30 Added optional index parameter

Version 2.22 Fixed clickMode and imageAlt behaviors

Version 2.21 Moved precaching image to bottom of page

Version 2.20 Added showFirst, showLast, click photo to advance, caption as photo ALT text

Version 2.13 Added slideshow features

Version 2.12 Parameterized ID's, wrapping optional

Version 2.11 Added caching of next image

Version 2.10 Added index functionality

Version 2.00 Functional browsing of images forward and back

*/



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

// ==== 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 ====

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



/*

Webmonkey GET Parsing Module

Language: JavaScript 1.0



Source: Webmonkey Code Library

(http://www.hotwired.com/webmonkey/javascript/code_library/)



Author: Patrick Corcoran

Author Email: patrick@taylor.org

*/



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' 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}

    // Make current photo # bold and don't make it a link

    if (i == glbCurrentPhoto) {

      indexString += '<b>' + linkNames[i-1] + '</b>';

    } 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(true);

  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"];

}