var Scenes = new Array();
Scenes[0] = "images/home2.jpg";
Scenes[1] = "images/room1.jpg";
Scenes[2] = "images/architecturalskew.jpg";
Scenes[3] = "images/home2.jpg";
Scenes[4] = "images/extension.jpg";
Scenes[5] = "images/exterior.jpg";
Scenes[6] = "images/hs.jpg";
Scenes[7] = "images/mt.jpg";
Scenes[8] = "images/contact.jpg";
Scenes[9] = "images/map.jpg";
var iter;
var Cache = new Array();
for (iter = 0; iter < Scenes.length; iter++)
{
   Cache[iter] = new Image(500, 375);
   Cache[iter].src = Scenes[iter];
}

function swapimage(id)
{
document.getElementById("mainimage").src = Cache[id].src;
}