//---------------------------------------------------------
//
// scripts include file
//
//---------------------------------------------------------

//---------------------------------------------------------
// variables
//---------------------------------------------------------
var gSlideshowInterval = 6;
var gNumberOfImages = 4;
var gImageCapableBrowser = canManipulateImages( document );
var gCurrentImage = 0;
var gImages = new Array(gNumberOfImages);

//---------------------------------------------------------
// script to preload and display images
//---------------------------------------------------------
function preLoad()
{
    var imgArray = new Array();
    var imgCount = 0;
    for( imgCount=0; imgCount<preLoad.arguments.length; imgCount++ )
    {
       imgArray[imgCount] = new Image();
       imgArray[imgCount].src = preLoad.arguments[imgCount]
    }
}
function canManipulateImages()
{
    if( document.images )
       return true;
    else
       return false;
}

function loadSlide( imageURL )
{
    if( gImageCapableBrowser ) {
        var imageobj = document.getElementById('r1');
        if (imageobj != null) {
            imageobj.src = imageURL;
        }
       //document.r1.src = imageURL;
       return false;
    }
    else
    {
       return true;
    }
}
function nextSlide()
{
    gCurrentImage = (( gCurrentImage + 1 ) % gNumberOfImages);
    loadSlide( gImages[gCurrentImage] );
}

function RotateImages()
{
//    gImages[0] = "images/studyrotate.png";
//    gImages[1] = "images/clayrotate.png";
//    gImages[2] = "images/soccerrotate.png";
//    gImages[3] = "images/bandrotate.png";

    gCurrentImage = 0;

    setInterval( "nextSlide()", gSlideshowInterval * 1000 );
}