function overThumbNail(imgID){
    
}
function clickThumbNail(imgID){
    var pictureToDisplay = imgID.split('-')[1]
    
    for(var cl = 0; cl < document.getElementById("loadedPictureContainer").getElementsByTagName("img").length; cl++){
        document.getElementById("picture-" + cl + "Div").style.zIndex = 0;
    }
    document.getElementById("picture-" + pictureToDisplay + "Div").style.zIndex = 1;
}