function showLayer(layerid) {
  var layer = document.getElementById(layerid);
  layer.style.visibility = "visible";
}

function hideLayer(layerid) {
  var layer = document.getElementById(layerid);
  layer.style.visibility = "hidden";
}

function turnOn(currentLink) {
  currentLink.style.color = "#FF8C00"
  currentLink.style.fontWeight = "normal";
}

function turnOff(currentLink) {
  currentLink.style.color = "#EEEEEE";
  currentLink.style.fontWeight = "normal";
}


var currentSelect = 0;
var currentIndex = 0;

var photoOption 
  = new Array( "National Collegiate Championships", 
                "Pompey Hill Time Trial 1");

var photoInfo 
  = new Array( "April 16, 2005 - Lake Havasu City, AX",
               "April 28, 2005 - Jameville - Pompey, NY" );

var photoDir 
  = new Array( "gallery/nationals_2005", 
               "gallery/pompey_tt_1" );

var photoNum
  = new Array( 30, 11 );

function initial_select(form)
{
  currentSelect = form.photoSelector.selectedIndex;
  currentIndex = 0;
  document.photoImage.src = photoDir[currentSelect] + "/" + currentIndex + ".JPG";

}

function prev_photo()
{
  if ( currentIndex > 1) {
    currentIndex = currentIndex - 1;
    document.photoImage.src = photoDir[currentSelect] + "/" + currentIndex + ".JPG";
  } 

  if ( currentIndex < 1) {
    currentIndex = photoNum[currentSelect] - 1;
    document.photoImage.src = photoDir[currentSelect] + "/" + currentIndex + ".JPG";
  } 

}

function next_photo()
{
  if (currentIndex < photoNum[currentSelect] - 1) {
    currentIndex = currentIndex + 1;
    document.photoImage.src = photoDir[currentSelect] + "/" + currentIndex + ".JPG";
  }

  if (currentIndex = photoNum[currentSelect] - 1) {
    currentIndex = 0;
    document.photoImage.src = photoDir[currentSelect] + "/" + currentIndex + ".JPG";
  }

}

function setTopPhoto()
{
  maxFileNum = 7;
  document.topPhoto.src = "img/top/" + randomNumber(7) + ".JPG";
}


function randomNumber(n)
{
  return Math.floor(Math.random() * (n + 1));
}

function photo_selector()
{
  document.write('This is a test!!!!!');
}