var arImagesTumb = new Array();
var arImages = new Array();
var arTexts = new Array();
var dvDesc = null;
var dbMainImage = null;
var dvPrev = null;
var dvNext = null;
var dvPrevText = null;
var dvNextText = null;
var dvPDF = null;
var dvScroll = null;

var glID = 0;
var glImgID = 0;

var blnStarted = false;

function initgallery()
{
    dvDesc = document.getElementById("dvDesc");
    dbMainImage = document.getElementById("dbMainImage");
    dvPrev = document.getElementById("dvPrev");
    dvNext = document.getElementById("dvNext");
    dvPrevText = document.getElementById("dvPrevText");
    dvNextText = document.getElementById("dvNextText");
    dvPDF = document.getElementById("dvPDF");
    dvScroll = document.getElementById("dvScroll");
    
    glImgID = 0;
    show(0);
    
    fillup();
    
}
function goPrev()
{
    glImgID--;
    show(glImgID);
}
function goNext()
{
    glImgID++;
    show(glImgID);
}
function checkPrevNextNav(glImgID)
{
    if(glImgID<=0)
    {
        dvPrev.style.display = "none";
        dvPrevText.style.display = "none";
    }
    else
    {
        dvPrev.style.display = "inline";
        dvPrevText.style.display = "inline";
    }
    if(glImgID>=arImages.length - 1)
    {
        dvNext.style.display = "none";
        dvNextText.style.display = "none";
    }
    else
    {
        dvNext.style.display = "inline";
        dvNextText.style.display = "inline";
    }
}

function addLoadEvent(func) 
{   
    var oldonload = window.onload;   
    if (typeof window.onload != 'function') 
    {       
        window.onload = func;   
    }   
    else 
    {       
        window.onload = function() 
                        {           
                            oldonload();           
                            func();       
                        }   
    }
}
function show(i)
{
    dbMainImage.src = arImages[i];
    dvDesc.innerText = arTexts[i];
    
    checkPrevNextNav(i);
}