function openBook( parentNode, bookIndex )
{
    $(".books").fadeOut( 'slow', 
       function()
       {
            $("#book" + bookIndex).fadeIn(); 
       });
    return false;
}

function resetBookshop()
{
    document.getElementById( "bookA" ).style.display = "none";
    document.getElementById( "bookB" ).style.display = "none";
    var divElements = document.getElementsByTagName("<div>");
    
    $(".books").fadeIn();
}