if (document.images)
{
   img1 = new Image();
   img2 = new Image();
   img3 = new Image();
   img4 = new Image();
   img5 = new Image();
   img6 = new Image();
   img7 = new Image();
   img8 = new Image();
   img9 = new Image();
   img10 = new Image();
   img11 = new Image();
   img12 = new Image();
   img13 = new Image();
   img1.src = "images/top.gif";
   img2.src = "images/top_right.gif";
   img3.src = "images/top_left.gif";
   img4.src = "images/bottom.gif"
   img5.src = "images/bottom_right.gif"
   img6.src = "images/bottom_left.gif"
   img7.src = "images/left.gif"
   img8.src = "images/right.gif"
   img9.src = "images/hud_left.gif"
   img10.src = "images/hud_right.gif"
   img11.src = "images/hud_mid.gif"
   img12.src = "images/hud_mid_b.gif"
   img13.src = "images/hud_mid_t.gif"
}