function BtPM1(flag, position)
{
if ((navigator.userAgent.indexOf("a/3",0) >= 0) || (navigator.userAgent.indexOf("a/4",0) >= 0))
  {
  var NewBtPM1 = eval(flag + ".src");
  document.images[position].src=NewBtPM1;
  }
}

if ((navigator.userAgent.indexOf("a/3",0) >= 0) || (navigator.userAgent.indexOf("a/4",0) >= 0))
{
BtPM11s =  new Image();
BtPM11s.src = "pics/prodmenu11.jpg";
BtPM11b =  new Image();
BtPM11b.src = "pics/prodmenu11b.jpg";
BtPM12s =  new Image();
BtPM12s.src = "pics/prodmenu12.jpg";
BtPM12b =  new Image();
BtPM12b.src = "pics/prodmenu12b.jpg";
BtPM13s =  new Image();
BtPM13s.src = "pics/prodmenu13.jpg";
BtPM13b =  new Image();
BtPM13b.src = "pics/prodmenu13b.jpg";
BtPM14s =  new Image();
BtPM14s.src = "pics/prodmenu14.jpg";
BtPM14b =  new Image();
BtPM14b.src = "pics/prodmenu14b.jpg";
BtPM15s =  new Image();
BtPM15s.src = "pics/prodmenu15.jpg";
BtPM15b =  new Image();
BtPM15b.src = "pics/prodmenu15b.jpg";
}