slideShowURL = 'SlideShow_assets/SlideShow.html';       // parameter from openSlideShowWindow.js
slideShowNS4URL = 'SlideShow_assets/SlideShowNS4.html'; // parameter from openSlideShowWindow.js

slides = new Array();
slides[0] = new Slide('../Lithography_files/P1010931_edited_w.jpg', '505', '713', 'Lithographic stone ready for drawing\n');
slides[1] = new Slide('../Lithography_files/P1010932_edited_w.jpg', '615', '461', 'Completing a drawing');
slides[2] = new Slide('../Lithography_files/P1010934_edited_w.jpg', '266', '345', 'Applying rosin and talc');
slides[3] = new Slide('../Lithography_files/P1010974_edited_w.jpg', '510', '381', 'Mixing the etch');
slides[4] = new Slide('../Lithography_files/P1010941_edited_w.jpg', '512', '384', 'Rubbing in the etch');
slides[5] = new Slide('../Lithography_files/P1010954_edited_w.jpg', '324', '381', 'Washing out the image with lithotene');
slides[6] = new Slide('../Lithography_files/P1010957_edited_w.jpg', '323', '451', 'Rubbing in the asphaltum');
slides[7] = new Slide('../Lithography_files/P1010951_edited_w.jpg', '417', '613', 'Charging the roller');
slides[8] = new Slide('../Lithography_files/P1010962_edited_w.jpg', '380', '590', 'Rolling up the image');
slides[9] = new Slide('../Lithography_files/P1010994_edited_w.jpg', '516', '458', 'Getting ready to print');
slides[10] = new Slide('../Lithography_files/P1011000_edited_w.jpg', '522', '432', 'Running the stone through \nthe press');
slides[11] = new Slide('../Lithography_files/P1011027_edited_w.jpg', '425', '560', 'Pulling a proof');
isPureISOLatin1 = true;
contentEncodingConstant = 4;
feedbackURL = "TODO";
showFeedbackButton = false;
feedbackEnabled = true;

var smallTransparentGif = "";
function fixupIEPNG(strImageID, transparentGif) 
{
    smallTransparentGif = transparentGif;
    if (windowsInternetExplorer && (browserVersion < 7))
    {
        var img = document.getElementById(strImageID);
        if (img)
        {
            var src = img.src;
            img.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + src + "', sizingMethod='scale')";
            img.src = transparentGif;
            img.attachEvent("onpropertychange", imgPropertyChanged);
        }
    }
}

var windowsInternetExplorer = false;
var browserVersion = 0;
function detectBrowser()
{
    windowsInternetExplorer = false;
    var appVersion = navigator.appVersion;
    if ((appVersion.indexOf("MSIE") != -1) &&
        (appVersion.indexOf("Macintosh") == -1))
    {
        var temp = appVersion.split("MSIE");
        browserVersion = parseFloat(temp[1]);
        windowsInternetExplorer = true;
    }
}

function onPageLoad()
{
    detectBrowser();
    fixupIEPNG("id1", "Lithography_files/transparent.gif");
    fixupIEPNG("id2", "Lithography_files/transparent.gif");
    fixupIEPNG("id3", "Lithography_files/transparent.gif");
    fixupIEPNG("id4", "Lithography_files/transparent.gif");
    fixupIEPNG("id5", "Lithography_files/transparent.gif");
    fixupIEPNG("id6", "Lithography_files/transparent.gif");
    fixupIEPNG("id7", "Lithography_files/transparent.gif");
    fixupIEPNG("id8", "Lithography_files/transparent.gif");
    fixupIEPNG("id9", "Lithography_files/transparent.gif");
    fixupIEPNG("id10", "Lithography_files/transparent.gif");
    fixupIEPNG("id11", "Lithography_files/transparent.gif");
    fixupIEPNG("id12", "Lithography_files/transparent.gif");
    fixupIEPNG("id13", "Lithography_files/transparent.gif");
    fixupIEPNG("id14", "Lithography_files/transparent.gif");
    fixupIEPNG("id15", "Lithography_files/transparent.gif");
    fixupIEPNG("id16", "Lithography_files/transparent.gif");
    fixupIEPNG("id17", "Lithography_files/transparent.gif");
    fixupIEPNG("id18", "Lithography_files/transparent.gif");
    fixupIEPNG("id19", "Lithography_files/transparent.gif");
    fixupIEPNG("id20", "Lithography_files/transparent.gif");
    fixupIEPNG("id21", "Lithography_files/transparent.gif");
    fixupIEPNG("id22", "Lithography_files/transparent.gif");
    return true;
}

var inImgPropertyChanged = false;
function imgPropertyChanged()
{
    if ((window.event.propertyName == "src") && (! inImgPropertyChanged))
    {
        inImgPropertyChanged = true;
        var el = window.event.srcElement;
        if (el.src != smallTransparentGif)
        {
            el.filters.item(0).src = el.src;
            el.src = smallTransparentGif;
        }
        inImgPropertyChanged = false;
    }
}