Club Drupal

/**

 *  @file

 *  A simple jQuery Cycle Div Slideshow Rotator.

 */

/**

 * This will set our initial behavior, by starting up each individual slideshow.

 */

(function ($) {

  Drupal.behaviors.viewsSlideshowCycle = {

    attach: function (context) {

      $('.views_slideshow_cycle_main:not(.viewsSlideshowCycle-processed)', context).addClass('viewsSlideshowCycle-processed').each(function() {

        var fullId = '#' + $(this).attr('id');

        var settings = Drupal.settings.viewsSlideshowCycle[fullId];

        settings.targetId = '#' + $(fullId + " :first").attr('id');

        settings.slideshowId = settings.targetId.replace('#views_slideshow_cycle_teaser_section_', '');

        // Pager after function.

        var pager_after_fn = function(curr, next, opts) {

          // Need to do some special handling on first load.

          var slideNum = opts.currSlide;

          if (typeof settings.processedAfter == 'undefined' || !settings.processedAfter) {

            settings.processedAfter = 1;

            slideNum = (typeof settings.opts.startingSlide == 'undefined') ? 0 : settings.opts.startingSlide;

          }

          if (settings.pause_after_slideshow) {

            opts.counter += 1;

            if (opts.counter == settings.num_divs + 1) {

              opts.counter = 1;

              Drupal.viewsSlideshow.action({ "action": 'pause', "slideshowID": settings.slideshowId, "force": true });

            }

          }

          Drupal.viewsSlideshow.action({ "action": 'transitionEnd', "slideshowID": settings.slideshowId, "slideNum": slideNum });

        }

        // Pager before function.

        var pager_before_fn = function(curr, next, opts) {

          $(document).trigger('drupal:views_slideshow_cycle:before', {

            curr: curr, next: next, opts: opts, settings: settings

          });

          var slideNum = opts.nextSlide;

          // Remember last slide.

          if (settings.remember_slide) {

            createCookie(settings.vss_id, slideNum, settings.remember_slide_days);

          }

          // Make variable height.

          if (!settings.fixed_height) {

            //get the height of the current slide

            var $ht = $(next).height();

            //set the container's height to that of the current slide

            $(next).parent().animate({height: $ht});

          }

          // Need to do some special handling on first load.

          if (typeof settings.processedBefore == 'undefined' || !settings.processedBefore) {

            settings.processedBefore = 1;

            slideNum = (typeof opts.startingSlide == 'undefined') ? 0 : opts.startingSlide;

          }

          Drupal.viewsSlideshow.action({ "action": 'transitionBegin', "slideshowID": settings.slideshowId, "slideNum": slideNum });

        }

        settings.loaded = false;

        settings.opts = {

          speed:settings.speed,

          timeout:settings.timeout,

          delay:settings.delay,

          sync:settings.sync,

          random:settings.random,

          nowrap:settings.nowrap,

          pause_after_slideshow:settings.pause_after_slideshow,

          counter:0,

          after:pager_after_fn,

          before:pager_before_fn,

          cleartype:(settings.cleartype)? true : false,

          cleartypeNoBg:(settings.cleartypenobg)? true : false

        }

        // Set the starting slide if we are supposed to remember the slide

        if (settings.remember_slide) {

          var startSlide = readCookie(settings.vss_id);

          if (startSlide == null) {

            startSlide = 0;

          }

          settings.opts.startingSlide = parseInt(startSlide);

        }

        if (settings.effect == 'none') {

          settings.opts.speed = 1;

        }

        else {

          settings.opts.fx = settings.effect;

        }

        // Take starting item from fragment.

        var hash = location.hash;

        if (hash) {

          var hash = hash.replace('#', '');

          var aHash = hash.split(';');

          var aHashLen = aHash.length;

          // Loop through all the possible starting points.

          for (var i = 0; i < aHashLen; i++) {

            // Split the hash into two parts. One part is the slideshow id the

            // other is the slide number.

            var initialInfo = aHash[i].split(':');

            // The id in the hash should match our slideshow.

            // The slide number chosen shouldn't be larger than the number of

            // slides we have.

            if (settings.slideshowId == initialInfo[0] && settings.num_divs > initialInfo[1]) {

              settings.opts.startingSlide = parseInt(initialInfo[1]);

            }

          }

        }

        // Pause on hover.

        if (settings.pause) {

          var mouseIn = function() {

            Drupal.viewsSlideshow.action({ "action": 'pause', "slideshowID": settings.slideshowId });

          }

          var mouseOut = function() {

            Drupal.viewsSlideshow.action({ "action": 'play', "slideshowID": settings.slideshowId });

          }

          if (jQuery.fn.hoverIntent) {

            $('#views_slideshow_cycle_teaser_section_' + settings.vss_id).hoverIntent(mouseIn, mouseOut);

          }

          else {

            $('#views_slideshow_cycle_teaser_section_' + settings.vss_id).hover(mouseIn, mouseOut);

          }

        }

        // Play on hover.

        if (settings.play_on_hover) {

          var mouseIn = function() {

            Drupal.viewsSlideshow.action({ "action": 'play', "slideshowID": settings.slideshowId, "force": true });

          }

          var mouseOut = function() {

            Drupal.viewsSlideshow.action({ "action": 'pause', "slideshowID": settings.slideshowId });

          }

          if (jQuery.fn.hoverIntent) {

            $('#views_slideshow_cycle_teaser_section_' + settings.vss_id).hoverIntent(mouseIn, mouseOut);

          }

          else {

            $('#views_slideshow_cycle_teaser_section_' + settings.vss_id).hover(mouseIn, mouseOut);

          }

        }

        // Pause on clicking of the slide.

        if (settings.pause_on_click) {

          $('#views_slideshow_cycle_teaser_section_' + settings.vss_id).click(function() {

            Drupal.viewsSlideshow.action({ "action": 'pause', "slideshowID": settings.slideshowId, "force": true });

          });

        }

        if (typeof JSON != 'undefined') {

          var advancedOptions = JSON.parse(settings.advanced_options);

          for (var option in advancedOptions) {

            switch(option) {

              // Standard Options

              case "activePagerClass":

              case "allowPagerClickBubble":

              case "autostop":

              case "autostopCount":

              case "backwards":

              case "bounce":

              case "cleartype":

              case "cleartypeNoBg":

              case "containerResize":

              case "continuous":

              case "delay":

              case "easeIn":

              case "easeOut":

              case "easing":

              case "fastOnEvent":

              case "fit":

              case "fx":

              case "manualTrump":

              case "metaAttr":

              case "next":

              case "nowrap":

              case "pager":

              case "pagerEvent":

              case "pause":

              case "pauseOnPagerHover":

              case "prev":

              case "prevNextEvent":

              case "random":

              case "randomizeEffects":

              case "requeueOnImageNotLoaded":

              case "requeueTimeout":

              case "rev":

              case "slideExpr":

              case "slideResize":

              case "speed":

              case "speedIn":

              case "speedOut":

              case "startingSlide":

              case "sync":

              case "timeout":

                var optionValue = advancedOptions[option];

                optionValue = Drupal.viewsSlideshowCycle.advancedOptionCleanup(optionValue);

                settings.opts[option] = optionValue;

                break;

              // If width is set we need to disable resizing.

              case "width":

                var optionValue = advancedOptions["width"];

                optionValue = Drupal.viewsSlideshowCycle.advancedOptionCleanup(optionValue);

                settings.opts["width"] = optionValue;

                settings.opts["containerResize"] = 0;

                break;

              // If height is set we need to set fixed_height to true.

              case "height":

                var optionValue = advancedOptions["height"];

                optionValue = Drupal.viewsSlideshowCycle.advancedOptionCleanup(optionValue);

                settings.opts["height"] = optionValue;

                settings.fixed_height = 1;

                break;

              // These process options that look like {top:50, bottom:20}

              case "animIn":

              case "animInDelay":

              case "animOut":

              case "animOutDelay":

              case "cssBefore":

              case "cssAfter":

              case "shuffle":

                var cssValue = advancedOptions[option];

                cssValue = Drupal.viewsSlideshowCycle.advancedOptionCleanup(cssValue);

                settings.opts[option] = eval('(' + cssValue + ')');

                break;

              // These options have their own functions.

              case "after":

                var afterValue = advancedOptions[option];

                afterValue = Drupal.viewsSlideshowCycle.advancedOptionCleanup(afterValue);

                // transition callback (scope set to element that was shown): function(currSlideElement, nextSlideElement, options, forwardFlag)

                settings.opts[option] = function(currSlideElement, nextSlideElement, options, forwardFlag) {

                  pager_after_fn(currSlideElement, nextSlideElement, options);

                  eval(afterValue);

                }

                break;

              case "before":

                var beforeValue = advancedOptions[option];

                beforeValue = Drupal.viewsSlideshowCycle.advancedOptionCleanup(beforeValue);

                // transition callback (scope set to element to be shown):     function(currSlideElement, nextSlideElement, options, forwardFlag)

                settings.opts[option] = function(currSlideElement, nextSlideElement, options, forwardFlag) {

                  pager_before_fn(currSlideElement, nextSlideElement, options);

                  eval(beforeValue);

                }

                break;

              case "end":

                var endValue = advancedOptions[option];

                endValue = Drupal.viewsSlideshowCycle.advancedOptionCleanup(endValue);

                // callback invoked when the slideshow terminates (use with autostop or nowrap options): function(options)

                settings.opts[option] = function(options) {

                  eval(endValue);

                }

                break;

              case "fxFn":

                var fxFnValue = advancedOptions[option];

                fxFnValue = Drupal.viewsSlideshowCycle.advancedOptionCleanup(fxFnValue);

                // function used to control the transition: function(currSlideElement, nextSlideElement, options, afterCalback, forwardFlag)

                settings.opts[option] = function(currSlideElement, nextSlideElement, options, afterCalback, forwardFlag) {

                  eval(fxFnValue);

                }

                break;

              case "onPagerEvent":

                var onPagerEventValue = advancedOptions[option];

                onPagerEventValue = Drupal.viewsSlideshowCycle.advancedOptionCleanup(onPagerEventValue);

                settings.opts[option] = function(zeroBasedSlideIndex, slideElement) {

                  eval(onPagerEventValue);

                }

                break;

              case "onPrevNextEvent":

                var onPrevNextEventValue = advancedOptions[option];

                onPrevNextEventValue = Drupal.viewsSlideshowCycle.advancedOptionCleanup(onPrevNextEventValue);

                settings.opts[option] = function(isNext, zeroBasedSlideIndex, slideElement) {

                  eval(onPrevNextEventValue);

                }

                break;

              case "pagerAnchorBuilder":

                var pagerAnchorBuilderValue = advancedOptions[option];

                pagerAnchorBuilderValue = Drupal.viewsSlideshowCycle.advancedOptionCleanup(pagerAnchorBuilderValue);

                // callback fn for building anchor links:  function(index, DOMelement)

                settings.opts[option] = function(index, DOMelement) {

                  var returnVal = '';

                  eval(pagerAnchorBuilderValue);

                  return returnVal;

                }

                break;

              case "pagerClick":

                var pagerClickValue = advancedOptions[option];

                pagerClickValue = Drupal.viewsSlideshowCycle.advancedOptionCleanup(pagerClickValue);

                // callback fn for pager clicks:    function(zeroBasedSlideIndex, slideElement)

                settings.opts[option] = function(zeroBasedSlideIndex, slideElement) {

                  eval(pagerClickValue);

                }

                break;

              case "paused":

                var pausedValue = advancedOptions[option];

                pausedValue = Drupal.viewsSlideshowCycle.advancedOptionCleanup(pausedValue);

                // undocumented callback when slideshow is paused:    function(cont, opts, byHover)

                settings.opts[option] = function(cont, opts, byHover) {

                  eval(pausedValue);

                }

                break;

              case "resumed":

                var resumedValue = advancedOptions[option];

                resumedValue = Drupal.viewsSlideshowCycle.advancedOptionCleanup(resumedValue);

                // undocumented callback when slideshow is resumed:    function(cont, opts, byHover)

                settings.opts[option] = function(cont, opts, byHover) {

                  eval(resumedValue);

                }

                break;

              case "timeoutFn":

                var timeoutFnValue = advancedOptions[option];

                timeoutFnValue = Drupal.viewsSlideshowCycle.advancedOptionCleanup(timeoutFnValue);

                settings.opts[option] = function(currSlideElement, nextSlideElement, options, forwardFlag) {

                  // Set a sane return value unless function overrides it.

                  var returnVal = settings.timeout;

                  eval(timeoutFnValue);

                  return returnVal;

                }

                break;

              case "updateActivePagerLink":

                var updateActivePagerLinkValue = advancedOptions[option];

                updateActivePagerLinkValue = Drupal.viewsSlideshowCycle.advancedOptionCleanup(updateActivePagerLinkValue);

                // callback fn invoked to update the active pager link (adds/removes activePagerClass style)

                settings.opts[option] = function(pager, currSlideIndex) {

                  eval(updateActivePagerLinkValue);

                }

                break;

            }

          }

        }

        // If selected wait for the images to be loaded.

        // otherwise just load the slideshow.

        if (settings.wait_for_image_load) {

          // For IE/Chrome/Opera we if there are images then we need to make

          // sure the images are loaded before starting the slideshow.

          settings.totalImages = $(settings.targetId + ' img').length;

          if (settings.totalImages) {

            settings.loadedImages = 0;

            // Add a load event for each image.

            $(settings.targetId + ' img').each(function() {

              var $imageElement = $(this);

              $imageElement.bind('load', function () {

                Drupal.viewsSlideshowCycle.imageWait(fullId);

              });

              // Removing the source and adding it again will fire the load event.

              var imgSrc = $imageElement.attr('src');

              $imageElement.attr('src', '');

              $imageElement.attr('src', imgSrc);

            });

            // We need to set a timeout so that the slideshow doesn't wait

            // indefinitely for all images to load.

            setTimeout("Drupal.viewsSlideshowCycle.load('" + fullId + "')", settings.wait_for_image_load_timeout);

          }

          else {

            Drupal.viewsSlideshowCycle.load(fullId);

          }

        }

        else {

          Drupal.viewsSlideshowCycle.load(fullId);

        }

      });

    }

  };

  /**

   * Views Slideshow swipe support.

   */

  Drupal.behaviors.viewsSlideshowSwipe = {

    attach: function (context) {

      var isTouch = (('ontouchstart' in window) || (navigator.msMaxTouchPoints > 0));

      if (isTouch === true && $('.views-slideshow-cycle-main-frame').length) {

        var $slider = $('.views-slideshow-cycle-main-frame'),

          opts = {

            start: {x: 0, y: 0},

            end: {x: 0, y: 0},

            hdiff: 0,

            vdiff: 0,

            length: 0,

            angle: null,

            direction: null,

          },

          optsReset = $.extend(true, {}, opts),

         H_THRESHOLD =  110, // roughly one inch effective resolution on ipad

         V_THRESHOLD = 50;

        $slider.data('bw', opts)

        .bind('touchstart.cycle', function (e) {

          var touch = e.originalEvent.touches[0] || e.originalEvent.changedTouches[0];

          if (e.originalEvent.touches.length == 1) {

            var data = $(this).data('bw');

            data.start.x = touch.pageX;

            data.start.y = touch.pageY;

            $(this).data('bw', data);

          }

        })

        .bind('touchend.cycle', function (e) {

          var touch = e.originalEvent.touches[0] || e.originalEvent.changedTouches[0];

          var data = $(this).data('bw');

          data.end.x = touch.pageX;

          data.end.y = touch.pageY;

          $(this).data('bw', data);

          if (data.start.x != 0 && data.start.y != 0) {

            data.vdiff = data.start.x - data.end.x;

            data.hdiff = data.end.y - data.start.y;

            if (Math.abs(data.vdiff) == data.start.x && Math.abs(data.hdiff) == data.start.y) {

              data.vdiff = 0;

              data.hdiff = 0;

            }

            var length = Math.round(Math.sqrt(Math.pow(data.vdiff,2) + Math.pow(data.hdiff,2)));

            var rads = Math.atan2(data.hdiff, data.vdiff);

            var angle = Math.round(rads*180/Math.PI);

            if (angle < 0) { angle = 360 - Math.abs(angle); }

            if (length > H_THRESHOLD && V_THRESHOLD > data.hdiff) {

              e.preventDefault();

              if (angle > 135 && angle < 225) {

                var cyopt = $slider.data('cycle.opts');

                if (cyopt.currSlide > 0) {

                  $slider.cycle((cyopt.currSlide - 1), 'scrollRight');

                }

                else {

                   $slider.cycle((cyopt.slideCount - 1), 'scrollRight');

                }

              }

              else if (angle > 315 || angle < 45) {

                $slider.cycle('next');

              }

            }

          }

          data = $.extend(true, {}, optsReset);

        });

      }

    }

  };

  Drupal.viewsSlideshowCycle = Drupal.viewsSlideshowCycle || {};

  // Cleanup the values of advanced options.

  Drupal.viewsSlideshowCycle.advancedOptionCleanup = function(value) {

    value = $.trim(value);

    value = value.replace(/\n/g, '');

    if (value.match(/^[\d.]+%$/)) {

      // noop

    }

    else if (!isNaN(parseInt(value))) {

      value = parseInt(value);

    }

    else if (value.toLowerCase() == 'true') {

      value = true;

    }

    else if (value.toLowerCase() == 'false') {

      value = false;

    }

    return value;

  }

  // This checks to see if all the images have been loaded.

  // If they have then it starts the slideshow.

  Drupal.viewsSlideshowCycle.imageWait = function(fullId) {

    if (++Drupal.settings.viewsSlideshowCycle[fullId].loadedImages == Drupal.settings.viewsSlideshowCycle[fullId].totalImages) {

      Drupal.viewsSlideshowCycle.load(fullId);

    }

  };

  // Start the slideshow.

  Drupal.viewsSlideshowCycle.load = function (fullId) {

    var settings = Drupal.settings.viewsSlideshowCycle[fullId];

    // Make sure the slideshow isn't already loaded.

    if (!settings.loaded) {

      $(settings.targetId).cycle(settings.opts);

      settings.loaded = true;

      // Start Paused

      if (settings.start_paused) {

        Drupal.viewsSlideshow.action({ "action": 'pause', "slideshowID": settings.slideshowId, "force": true });

      }

      // Pause if hidden.

      if (settings.pause_when_hidden) {

        var checkPause = function(settings) {

          // If the slideshow is visible and it is paused then resume.

          // otherwise if the slideshow is not visible and it is not paused then

          // pause it.

          var visible = viewsSlideshowCycleIsVisible(settings.targetId, settings.pause_when_hidden_type, settings.amount_allowed_visible);

          if (visible) {

            Drupal.viewsSlideshow.action({ "action": 'play', "slideshowID": settings.slideshowId });

          }

          else {

            Drupal.viewsSlideshow.action({ "action": 'pause', "slideshowID": settings.slideshowId });

          }

        }

        // Check when scrolled.

        $(window).scroll(function() {

         checkPause(settings);

        });

        // Check when the window is resized.

        $(window).resize(function() {

          checkPause(settings);

        });

      }

    }

  };

  Drupal.viewsSlideshowCycle.pause = function (options) {

    //Eat TypeError, cycle doesn't handle pause well if options isn't defined.

    try{

      if (options.pause_in_middle && $.fn.pause) {

        $('#views_slideshow_cycle_teaser_section_' + options.slideshowID).pause();

      }

      else {

        $('#views_slideshow_cycle_teaser_section_' + options.slideshowID).cycle('pause');

      }

    }

    catch(e){

      if(!e instanceof TypeError){

        throw e;

      }

    }

  };

  Drupal.viewsSlideshowCycle.play = function (options) {

    Drupal.settings.viewsSlideshowCycle['#views_slideshow_cycle_main_' + options.slideshowID].paused = false;

    if (options.pause_in_middle && $.fn.resume) {

      $('#views_slideshow_cycle_teaser_section_' + options.slideshowID).resume();

    }

    else {

      $('#views_slideshow_cycle_teaser_section_' + options.slideshowID).cycle('resume');

    }

  };

  Drupal.viewsSlideshowCycle.previousSlide = function (options) {

    $('#views_slideshow_cycle_teaser_section_' + options.slideshowID).cycle('prev');

  };

  Drupal.viewsSlideshowCycle.nextSlide = function (options) {

    $('#views_slideshow_cycle_teaser_section_' + options.slideshowID).cycle('next');

  };

  Drupal.viewsSlideshowCycle.goToSlide = function (options) {

    $('#views_slideshow_cycle_teaser_section_' + options.slideshowID).cycle(options.slideNum);

  };

  // Verify that the value is a number.

  function IsNumeric(sText) {

    var ValidChars = "0123456789";

    var IsNumber=true;

    var Char;

    for (var i=0; i < sText.length && IsNumber == true; i++) {

      Char = sText.charAt(i);

      if (ValidChars.indexOf(Char) == -1) {

        IsNumber = false;

      }

    }

    return IsNumber;

  }

  /**

   * Cookie Handling Functions

   */

  function createCookie(name,value,days) {

    if (days) {

      var date = new Date();

      date.setTime(date.getTime()+(days*24*60*60*1000));

      var expires = "; expires="+date.toGMTString();

    }

    else {

      var expires = "";

    }

    document.cookie = name+"="+value+expires+"; path=/";

  }

  function readCookie(name) {

    var nameEQ = name + "=";

    var ca = document.cookie.split(';');

    for(var i=0;i < ca.length;i++) {

      var c = ca[i];

      while (c.charAt(0)==' ') c = c.substring(1,c.length);

      if (c.indexOf(nameEQ) == 0) {

        return c.substring(nameEQ.length,c.length);

      }

    }

    return null;

  }

  function eraseCookie(name) {

    createCookie(name,"",-1);

  }

  /**

   * Checks to see if the slide is visible enough.

   * elem = element to check.

   * type = The way to calculate how much is visible.

   * amountVisible = amount that should be visible. Either in percent or px. If

   *                it's not defined then all of the slide must be visible.

   *

   * Returns true or false

   */

  function viewsSlideshowCycleIsVisible(elem, type, amountVisible) {

    // Get the top and bottom of the window;

    var docViewTop = $(window).scrollTop();

    var docViewBottom = docViewTop + $(window).height();

    var docViewLeft = $(window).scrollLeft();

    var docViewRight = docViewLeft + $(window).width();

    // Get the top, bottom, and height of the slide;

    var elemTop = $(elem).offset().top;

    var elemHeight = $(elem).height();

    var elemBottom = elemTop + elemHeight;

    var elemLeft = $(elem).offset().left;

    var elemWidth = $(elem).width();

    var elemRight = elemLeft + elemWidth;

    var elemArea = elemHeight * elemWidth;

    // Calculate what's hiding in the slide.

    var missingLeft = 0;

    var missingRight = 0;

    var missingTop = 0;

    var missingBottom = 0;

    // Find out how much of the slide is missing from the left.

    if (elemLeft < docViewLeft) {

      missingLeft = docViewLeft - elemLeft;

    }

    // Find out how much of the slide is missing from the right.

    if (elemRight > docViewRight) {

      missingRight = elemRight - docViewRight;

    }

    // Find out how much of the slide is missing from the top.

    if (elemTop < docViewTop) {

      missingTop = docViewTop - elemTop;

    }

    // Find out how much of the slide is missing from the bottom.

    if (elemBottom > docViewBottom) {

      missingBottom = elemBottom - docViewBottom;

    }

    // If there is no amountVisible defined then check to see if the whole slide

    // is visible.

    if (type == 'full') {

      return ((elemBottom >= docViewTop) && (elemTop <= docViewBottom)

      && (elemBottom <= docViewBottom) &&  (elemTop >= docViewTop)

      && (elemLeft >= docViewLeft) && (elemRight <= docViewRight)

      && (elemLeft <= docViewRight) && (elemRight >= docViewLeft));

    }

    else if(type == 'vertical') {

      var verticalShowing = elemHeight - missingTop - missingBottom;

      // If user specified a percentage then find out if the current shown percent

      // is larger than the allowed percent.

      // Otherwise check to see if the amount of px shown is larger than the

      // allotted amount.

      if (typeof amountVisible === 'string' && amountVisible.indexOf('%')) {

        return (((verticalShowing/elemHeight)*100) >= parseInt(amountVisible));

      }

      else {

        return (verticalShowing >= parseInt(amountVisible));

      }

    }

    else if(type == 'horizontal') {

      var horizontalShowing = elemWidth - missingLeft - missingRight;

      // If user specified a percentage then find out if the current shown percent

      // is larger than the allowed percent.

      // Otherwise check to see if the amount of px shown is larger than the

      // allotted amount.

      if (typeof amountVisible === 'string' && amountVisible.indexOf('%')) {

        return (((horizontalShowing/elemWidth)*100) >= parseInt(amountVisible));

      }

      else {

        return (horizontalShowing >= parseInt(amountVisible));

      }

    }

    else if(type == 'area') {

      var areaShowing = (elemWidth - missingLeft - missingRight) * (elemHeight - missingTop - missingBottom);

      // If user specified a percentage then find out if the current shown percent

      // is larger than the allowed percent.

      // Otherwise check to see if the amount of px shown is larger than the

      // allotted amount.

      if (typeof amountVisible === 'string' && amountVisible.indexOf('%')) {

        return (((areaShowing/elemArea)*100) >= parseInt(amountVisible));

      }

      else {

        return (areaShowing >= parseInt(amountVisible));

      }

    }

  }

})(jQuery);