/*
File: photoviewer.js
Author: Peter Foran
Purpose: Contains functionality for the javascript image viewer on client sites
Created: 10 November 2007
*/

function getElementBy(elemTag) {
    var elem = document.getElementById(elemTag);
    if (elem)
        return elem;
    var elems = document.getElementsByName(elemTag);
    if (elems.length > 0)
        return elems[0];
    return null;
}

var lastImageShown = 0;
var blnPlaySlideShow = true;

function ImgChange(imgNumber) {
    document.getElementById('lblCurrentImage').innerHTML = '' + imgNumber + '';
    lastImageShown = imgNumber;

    if (document.all) {
        document.images['ImageFull'].style.filter = 'blendTrans(duration=2)';
        document.images['ImageFull'].style.filter = 'blendTrans(duration=crossFadeDuration)';
        document.images['ImageFull'].filters.blendTrans.Apply();
    }

    document.images['ImageFull'].src = eval('ImageFull' + imgNumber + ".src");

    if (document.all)
        document.images['ImageFull'].filters.blendTrans.Play();
}

function ImgPlay() {
    blnPlaySlideShow = true;
    ImgChangeNext(true);
}

function ImgStop() {
    blnPlaySlideShow = false;
}

function ImgTogglePlayStop() {
    if (document.getElementById("btnPlay").value == "Stop") {
        ImgStop();
        document.getElementById("btnPlay").value = "Play";
    }
    else {
        ImgPlay();
        document.getElementById("btnPlay").value = "Stop";
    }
}

function ImgChangeNext(blnAuto) {
    if (blnAuto == false || (blnAuto == true && blnPlaySlideShow == true)) {
        var i = lastImageShown + 1;
        if (i > imageCount)
            i = 1;

        ImgChange(i);
        showPhotoDesc(i); //added this hoping it will update the description
    }

    if (blnAuto == true && blnPlaySlideShow == true)
        setTimeout("ImgChangeNext(true)", 4000); //<`-- The number here is the # of milliseconds to wait before changing to the next photo
}

function ImgChangePrev() {
    var i = lastImageShown - 1;
    if (i < 1)
        i = imageCount;

    ImgChange(i);
}

function showPhotoDesc(i) {
    if (photoDescArray[i] != undefined && photoDescArray[i].length > 0)
        getElementBy('photoDesc').innerHTML = photoDescArray[i];
    else
        getElementBy('photoDesc').innerHTML = "";
}

//configure menu width (in px):
var menuwidth = '278';
//configure menu height (in px):
var menuheight = '52';
//configure scroll speed (1-10), where larger is faster
var scrollspeed = 6

//=============================
//BEGIN propertyphotoscroll.js

var cross_scroll;
var ns_scroll;
var loadedyes = 1;
var righttime;
var lefttime;

function moveleft() {
    cross_scroll = document.getElementById ? document.getElementById("thumblist") : document.all.thumblist;

    if (loadedyes == 1 && cross_scroll.offsetLeft > (menuwidth - cross_scroll.offsetWidth))
        cross_scroll.style.left = cross_scroll.offsetLeft - scrollspeed + "px";
    lefttime = setTimeout("moveleft();", 50);
}

function moveright() {
    cross_scroll = document.getElementById ? document.getElementById("thumblist") : document.all.thumblist;

    if (loadedyes == 1 && cross_scroll.offsetLeft < 0)
        cross_scroll.style.left = cross_scroll.offsetLeft + scrollspeed + "px";
    righttime = setTimeout("moveright();", 50);
}