// preload images used in menu and toolbar rollovers

if (document.images)
   {
   // menu 

   about1 = new Image(175,19);
   about1.src = "assets/images/menu/about1.gif";
   about2 = new Image(175,19);
   about2.src = "assets/images/menu/about2.gif";

   NHAAP1 = new Image(175,19);
   NHAAP1.src = "assets/images/menu/NHAAP1.gif";
   NHAAP2 = new Image(175,19);
   NHAAP2.src = "assets/images/menu/NHAAP2.gif";

   abstract1 = new Image(175,19);
   abstract1.src = "assets/images/menu/abstract1.gif";
   abstract2 = new Image(175,19);
   abstract2.src = "assets/images/menu/abstract2.gif";

   goal1 = new Image(175,19);
   goal1.src = "assets/images/menu/goal1.gif";
   goal2 = new Image(175,19);
   goal2.src = "assets/images/menu/goal2.gif";

   background1 = new Image(175,19);
   background1.src = "assets/images/menu/background1.gif";
   background2 = new Image(175,19);
   background2.src = "assets/images/menu/background2.gif";

   storyboard1 = new Image(175,19);
   storyboard1.src = "assets/images/menu/storyboard1.gif";
   storyboard2 = new Image(175,19);
   storyboard2.src = "assets/images/menu/storyboard2.gif";

   cast1 = new Image(175,19);
   cast1.src = "assets/images/menu/cast1.gif";
   cast2 = new Image(175,19);
   cast2.src = "assets/images/menu/cast2.gif";

   architecture1 = new Image(175,19);
   architecture1.src = "assets/images/menu/architecture1.gif";
   architecture2 = new Image(175,19);
   architecture2.src = "assets/images/menu/architecture2.gif";

   evaluation1 = new Image(175,19);
   evaluation1.src = "assets/images/menu/evaluation1.gif";
   evaluation2 = new Image(175,19);
   evaluation2.src = "assets/images/menu/evaluation2.gif";

   play1 = new Image(175,19);
   play1.src = "assets/images/menu/play1.gif";
   play2 = new Image(175,19);
   play2.src = "assets/images/menu/play2.gif";

   publications1 = new Image(175,19);
   publications1.src = "assets/images/menu/publications1.gif";
   publications2 = new Image(175,19);
   publications2.src = "assets/images/menu/publications2.gif";

   team1 = new Image(175,19);
   team1.src = "assets/images/menu/team1.gif";
   team2 = new Image(175,19);
   team2.src = "assets/images/menu/team2.gif";

   sponsor1 = new Image(175,19);
   sponsor1.src = "assets/images/menu/sponsor1.gif";
   sponsor2 = new Image(175,19);
   sponsor2.src = "assets/images/menu/sponsor2.gif";

   contact1 = new Image(175,19);
   contact1.src = "assets/images/menu/contact1.gif";
   contact2 = new Image(175,19);
   contact2.src = "assets/images/menu/contact2.gif";
   }

// opens HS game in plain window

function hsWindow()
{
  hs_window = 
    window.open("http://www.acasa.upenn.edu/HS.htm","Heart Sense Game","resizable,width=814,height=614");
}



// simple image replacement

function imgSwap(imgDocID,imgObjName)
   {
   if (document.images)
      {
      document.images[imgDocID].src = eval(imgObjName + ".src")
      }
   }