if (document.images)
   {
    pic1on = new Image();
    pic1off = new Image();
    pic2on = new Image();
    pic2off = new Image();
    pic21on = new Image();
    pic21off = new Image();
    pic22on = new Image();
    pic22off = new Image();
    pic23on = new Image();
    pic23off = new Image();
    pic24on = new Image();
    pic24off = new Image();
    pic3on = new Image();
    pic3off = new Image();
    pic4on = new Image();
    pic4off = new Image();

    pic1on.src = "gfx/b1_d.gif";
    pic1off.src = "gfx/b1_u.gif";
    pic2on.src = "gfx/b2_d.gif";
    pic2off.src = "gfx/b2_u.gif";
    pic21on.src = "gfx/b21_d.gif";
    pic21off.src = "gfx/b21_u.gif";
    pic22on.src = "gfx/b22_d.gif";
    pic22off.src = "gfx/b22_u.gif";
    pic23on.src = "gfx/b23_d.gif";
    pic23off.src = "gfx/b23_u.gif";
    pic24on.src = "gfx/b24_d.gif";
    pic24off.src = "gfx/b24_u.gif";
    pic3on.src = "gfx/b3_d.gif";
    pic3off.src = "gfx/b3_u.gif";
    pic4on.src = "gfx/b4_d.gif";
    pic4off.src = "gfx/b4_u.gif";

   }
function idown(imageName)
   {
    if (document.images != null)
       {
        document[imageName].src =
            eval(imageName.substring(0, imageName.length - 1) + "on.src");
       }
   }
function iup(imageName)
   {
    if (document.images != null)
       {
        document[imageName].src =
            eval(imageName.substring(0, imageName.length - 1) + "off.src");
       }
   }
   
   
   
function flash (id, kolor, czas, kolor2, czas2 )

    {
    document.getElementById(id).style.color = kolor;
    setTimeout('flash("' + id + '","' + kolor2 + '",' + czas2 + ',"' + kolor + '",' + czas + ')', czas);
    
    
    }