function toggleImages(szName, isSwitchingToFirst) 
{
    var imgFirst = document.getElementById("imgFirst");
    var imgSecond = document.getElementById("imgSecond");
    var imgThird = document.getElementById("imgThird");

    var aImgFirst = document.getElementById("aImgFirst");
    var aImgSecond = document.getElementById("aImgSecond");
    var aImgThird = document.getElementById("aImgThird");
    var aImgFourth = document.getElementById("aImgFourth");

    if (isSwitchingToFirst) 
    {
        imgFirst.src = "images/" + szName + "_1.jpg";
        imgSecond.src = "images/" + szName + "_2.jpg";
        imgThird.src = "images/" + szName + "_3_fade.jpg";
        imgThird.setAttribute("onclick", "toggleImages('" + szName + "', false);");
        imgThird.onclick = function() { toggleImages(szName, false); };

        aImgFirst.href = "images/" + szName + "/" + szName + "_1_large.jpg";
        var szOldFirst = aImgFirst.title;
        aImgFirst.title = aImgThird.title;
        aImgSecond.href = "images/" + szName + "/" + szName + "_2_large.jpg";
        var szOldSecond = aImgSecond.title;
        aImgSecond.title = aImgFourth.title;
        aImgThird.href = "images/" + szName + "/" + szName + "_3_large.jpg";
        aImgThird.title = szOldFirst;
        aImgFourth.href = "images/" + szName + "/" + szName + "_4_large.jpg";
        aImgFourth.title = szOldSecond;
    }
    else 
    {
        imgFirst.src = "images/" + szName + "_3.jpg";
        imgSecond.src = "images/" + szName + "_4.jpg";
        imgThird.src = "images/backarrow.jpg";
        imgThird.setAttribute("onclick", "toggleImages('" + szName + "', true);");
        imgThird.onclick = function() { toggleImages(szName, true); };

        aImgFirst.href = "images/" + szName + "/" + szName + "_3_large.jpg";
        var szOldFirst = aImgFirst.title;
        aImgFirst.title = aImgThird.title;
        aImgSecond.href = "images/" + szName + "/" + szName + "_4_large.jpg";
        var szOldSecond = aImgSecond.title;
        aImgSecond.title = aImgFourth.title;
        aImgThird.href = "images/" + szName + "/" + szName + "_1_large.jpg";
        aImgThird.title = szOldFirst;
        aImgFourth.href = "images/" + szName + "/" + szName + "_2_large.jpg";
        aImgFourth.title = szOldSecond;
    }
}