// Array for images for random display.
var randomImageArray = new Array(18);
randomImageArray["Image0"] = "sharedfiles/navstation/images/site/RotatingImages/Random_1.jpg";
randomImageArray["Image1"] = "sharedfiles/navstation/images/site/RotatingImages/Random_2.jpg";
randomImageArray["Image2"] = "sharedfiles/navstation/images/site/RotatingImages/Random_3.jpg";
randomImageArray["Image3"] = "sharedfiles/navstation/images/site/RotatingImages/Random_4.jpg";
randomImageArray["Image4"] = "sharedfiles/navstation/images/site/RotatingImages/Random_17.jpg";  // Navin's Photo
randomImageArray["Image5"] = "sharedfiles/navstation/images/site/RotatingImages/Random_6.jpg";
randomImageArray["Image6"] = "sharedfiles/navstation/images/site/RotatingImages/Random_7.jpg";
randomImageArray["Image7"] = "sharedfiles/navstation/images/site/RotatingImages/Random_8.jpg";
randomImageArray["Image8"] = "sharedfiles/navstation/images/site/RotatingImages/Random_9.jpg";
randomImageArray["Image9"] = "sharedfiles/navstation/images/site/RotatingImages/Random_16.jpg";  // Bill's Photo
randomImageArray["Image10"] = "sharedfiles/navstation/images/site/RotatingImages/Random_13.jpg";
randomImageArray["Image11"] = "sharedfiles/navstation/images/site/RotatingImages/Random_14.jpg";
randomImageArray["Image12"] = "sharedfiles/navstation/images/site/RotatingImages/Random_15.jpg";  
randomImageArray["Image13"] = "sharedfiles/navstation/images/site/RotatingImages/Random_5.jpg";
randomImageArray["Image14"] = "sharedfiles/navstation/images/site/RotatingImages/Random_1.jpg";
randomImageArray["Image15"] = "sharedfiles/navstation/images/site/RotatingImages/Random_10.jpg";
randomImageArray["Image16"] = "sharedfiles/navstation/images/site/RotatingImages/Random_11.jpg";
randomImageArray["Image17"] = "sharedfiles/navstation/images/site/RotatingImages/Random_12.jpg";


// Pre-loader array for images.
//for (i=0; i < randomImageArray.length; i++)
//{
//  var preload = new Image();
//  preload.src = randomImageArray['Image'+i];
//}


function ShowRandomImage(thisImageName,numberOccurrences)
{
  // Swap a parsed image name (ie. name="thisImageName") and number of occurances (eg. "2" -> name="Image1", name="Image2")

  var lowerIndex = 1;
  var setCount = Math.round((randomImageArray.length) / numberOccurrences);
  var upperIndex = setCount;

  for (i = 1; i <= numberOccurrences; i++)
     {  
     var thisRandomIndex = Math.round(Math.random() * (upperIndex - lowerIndex)) + lowerIndex;
     document[thisImageName+i].src = randomImageArray['Image'+thisRandomIndex];
     lowerIndex = upperIndex + 1;
     upperIndex = upperIndex + setCount;
     }
}


//--------------------------------------------------------------------------------------


// Array for 'split' images for random display. Note that each image should be split the same number of times.
var randomSplitImageArray = new Array(0);
//randomSplitImageArray["Image1_1"] = "sharedfiles/navstation/images/site/photo_homecorner1.jpg";
//randomSplitImageArray["Image1_2"] = "sharedfiles/navstation/images/site/photo_homeleft1.jpg";
//randomSplitImageArray["Image1_3"] = "sharedfiles/navstation/images/site/photo_hometop1.jpg";
//randomSplitImageArray["Image1_4"] = "sharedfiles/navstation/images/site/photo_homebottom1.jpg";


// Pre-loader array for images.
for (i=0; i < randomSplitImageArray.length; i++)
{
  var preload = new Image();
  preload.src = randomSplitImageArray['Image'+i];
}


function ShowRandomSplitImage(thisImageGroupName,imageSplitCount)
{
  // Swap a parsed image name group of split images (ie. name="thisImageName1" would be parsed as "thisImageName", and
  // ImageSplitCount is number of split images making a whole image)

  var numOfWholeImages = (randomSplitImageArray.length / imageSplitCount);  //ie. 8 in the array / 4 splits = 2 whole images.
  var thisRandomIndex = Math.round(Math.random() * (numOfWholeImages - 1)) + 1;  //Get a random number within the number of whole images.

  for (i = 1; i <= imageSplitCount; i++)
     {
     //Cycle through and set the split image names.
     document[thisImageGroupName+i].src = randomSplitImageArray['Image'+thisRandomIndex+'_'+i];   //eg. 'Image1_3' in the array.
     }
}