function ChangeBanner(ActionImage, MainImageId)
{
    var MainImage = document.getElementById(MainImageId);
 
    var MainImageCurrentSource = MainImage.src;
    MainImage.src = MainImage.getAttribute("AlternateImage");
    MainImage.setAttribute("AlternateImage", MainImageCurrentSource);
    
    var ActionImageCurrentSource = ActionImage.src;
    ActionImage.src = ActionImage.getAttribute("AlternateImage");
    ActionImage.setAttribute("AlternateImage", ActionImageCurrentSource);
}