function changeMenuState(char_state, img, img_src)
        {
            if (char_state == 'd')
                img.src = "images/header_pics/" + img_src + ".jpg";
            if (char_state == 'r')
                img.src = "images/header_pics/" + img_src + "_o.jpg";
            if (char_state == 'o')
                img.src = "images/header_pics/" + img_src + ".jpg";
            if (char_state == 'u')
                img.src = "images/header_pics/" + img_src + ".jpg";
        }