var aryImages = new Array();

aryImages['stair1_A'] = "images/stair1_A.jpg";
aryImages['stair1_B'] = "images/stair1_B.jpg";
aryImages['stair1_C'] = "images/stair1_C.jpg";

aryImages['stair2_A'] = "images/stair2_A.jpg";
aryImages['stair2_B'] = "images/stair2_B.jpg";
aryImages['stair2_C'] = "images/stair2_C.jpg";
aryImages['stair2_D'] = "images/stair2_D.jpg";
aryImages['stair2_E'] = "images/stair2_E.jpg";
aryImages['stair2_F'] = "images/stair2_F.jpg";
aryImages['stair2_G'] = "images/stair2_G.jpg";
aryImages['stair2_H'] = "images/stair2_H.jpg";
aryImages['stair2_I'] = "images/stair2_I.jpg";

aryImages['stair3_A'] = "images/stair3_A.jpg";
aryImages['stair3_B'] = "images/stair3_B.jpg";
aryImages['stair3_C'] = "images/stair3_C.jpg";

aryImages['stair4_A'] = "images/stair4_A.jpg";
aryImages['stair4_B'] = "images/stair4_B.jpg";
aryImages['stair4_C'] = "images/stair4_C.jpg";
aryImages['stair4_D'] = "images/stair4_D.jpg";
aryImages['stair4_E'] = "images/stair4_E.jpg";
aryImages['stair4_F'] = "images/stair4_F.jpg";
aryImages['stair4_G'] = "images/stair4_G.jpg";
aryImages['stair4_H'] = "images/stair4_H.jpg";
aryImages['stair4_I'] = "images/stair4_I.jpg";
aryImages['stair4_J'] = "images/stair4_J.jpg";
aryImages['stair4_K'] = "images/stair4_K.jpg";
aryImages['stair4_L'] = "images/stair4_L.jpg";
aryImages['stair4_M'] = "images/stair4_M.jpg";
aryImages['stair4_N'] = "images/stair4_N.jpg";
aryImages['stair4_O'] = "images/stair4_O.jpg";
aryImages['stair4_P'] = "images/stair4_P.jpg";

aryImages['stair5_A'] = "images/stair5_A.jpg";
aryImages['stair5_B'] = "images/stair5_B.jpg";
aryImages['stair5_C'] = "images/stair5_C.jpg";
aryImages['stair5_D'] = "images/stair5_D.jpg";
aryImages['stair5_E'] = "images/stair5_E.jpg";
aryImages['stair5_F'] = "images/stair5_F.jpg";

aryImages['stair6_A'] = "images/stair6_A.jpg";
aryImages['stair6_B'] = "images/stair6_B.jpg";
aryImages['stair6_C'] = "images/stair6_C.jpg";

aryImages['stair7_A'] = "images/stair7_A.jpg";
aryImages['stair7_B'] = "images/stair7_B.jpg";
aryImages['stair7_C'] = "images/stair7_C.jpg";
aryImages['stair7_D'] = "images/stair7_D.jpg";
aryImages['stair7_E'] = "images/stair7_E.jpg";
aryImages['stair7_F'] = "images/stair7_F.jpg";
aryImages['stair7_G'] = "images/stair7_G.jpg";
aryImages['stair7_H'] = "images/stair7_H.jpg";
aryImages['stair7_I'] = "images/stair7_I.jpg";

aryImages['door1_A'] = "images/door1_A.jpg";
aryImages['door1_B'] = "images/door1_B.jpg";
aryImages['door1_C'] = "images/door1_C.jpg";
aryImages['door1_D'] = "images/door1_D.jpg";
aryImages['door1_E'] = "images/door1_E.jpg";
aryImages['door1_F'] = "images/door1_F.jpg";
aryImages['door1_G'] = "images/door1_G.jpg";

aryImages['door2_A'] = "images/door2_A.jpg";

aryImages['store1_A'] = "images/store1_A.jpg";
aryImages['store1_B'] = "images/store1_B.jpg";
aryImages['store1_C'] = "images/store1_C.jpg";
aryImages['store1_D'] = "images/store1_D.jpg";
aryImages['store1_E'] = "images/store1_E.jpg";
aryImages['store1_F'] = "images/store1_F.jpg";
aryImages['store1_G'] = "images/store1_G.jpg";
aryImages['store1_H'] = "images/store1_H.jpg";
aryImages['store1_I'] = "images/store1_I.jpg";

aryImages['store2_A'] = "images/store2_A.jpg";
aryImages['store2_B'] = "images/store2_B.jpg";
aryImages['store2_C'] = "images/store2_C.jpg";
aryImages['store2_D'] = "images/store2_D.jpg";
aryImages['store2_E'] = "images/store2_E.jpg";

aryImages['wall1_A'] = "images/wall1_A.jpg";
aryImages['wall1_B'] = "images/wall1_B.jpg";
aryImages['wall1_C'] = "images/wall1_C.jpg";
aryImages['wall1_D'] = "images/wall1_D.jpg";
aryImages['wall1_E'] = "images/wall1_E.jpg";
aryImages['wall1_F'] = "images/wall1_F.jpg";
aryImages['wall1_G'] = "images/wall1_G.jpg";

aryImages['wall2_A'] = "images/wall2_A.jpg";

aryImages['wall3_A'] = "images/wall3_A.jpg";
aryImages['wall3_B'] = "images/wall3_B.jpg";
aryImages['wall3_C'] = "images/wall3_C.jpg";

aryImages['wall4_A'] = "images/wall4_A.jpg";
aryImages['wall4_B'] = "images/wall4_B.jpg";
aryImages['wall4_C'] = "images/wall4_C.jpg";
aryImages['wall4_D'] = "images/wall4_D.jpg";
aryImages['wall4_E'] = "images/wall4_E.jpg";

aryImages['wall5_A'] = "images/wall5_A.jpg";
aryImages['wall5_B'] = "images/wall5_B.jpg";
aryImages['wall5_C'] = "images/wall5_C.jpg";
aryImages['wall5_D'] = "images/wall5_D.jpg";
aryImages['wall5_E'] = "images/wall5_E.jpg";
aryImages['wall5_F'] = "images/wall5_F.jpg";
aryImages['wall5_G'] = "images/wall5_G.jpg";
aryImages['wall5_H'] = "images/wall5_H.jpg";

aryImages['wall6_A'] = "images/wall6_A.jpg";
aryImages['wall6_B'] = "images/wall6_B.jpg";
aryImages['wall6_C'] = "images/wall6_C.jpg";
aryImages['wall6_D'] = "images/wall6_D.jpg";
aryImages['wall6_E'] = "images/wall6_E.jpg";
aryImages['wall6_F'] = "images/wall6_F.jpg";
aryImages['wall6_G'] = "images/wall6_G.jpg";
aryImages['wall6_H'] = "images/wall6_H.jpg";
aryImages['wall6_I'] = "images/wall6_I.jpg";
aryImages['wall6_J'] = "images/wall6_J.jpg";
aryImages['wall6_K'] = "images/wall6_K.jpg";
aryImages['wall6_L'] = "images/wall6_L.jpg";
aryImages['wall6_M'] = "images/wall6_M.jpg";
aryImages['wall6_N'] = "images/wall6_N.jpg";
aryImages['wall6_O'] = "images/wall6_O.jpg";
aryImages['wall6_P'] = "images/wall6_P.jpg";
aryImages['wall6_Q'] = "images/wall6_Q.jpg";
aryImages['wall6_R'] = "images/wall6_R.jpg";
aryImages['wall6_S'] = "images/wall6_S.jpg";
aryImages['wall6_T'] = "images/wall6_T.jpg";

for (i=0; i < aryImages.length; i++) {
	var preload = new Image();
	preload.src = aryImages[i];
}

function swap(imgIndex, imgTarget) {
	document[imgTarget].src = aryImages[imgIndex];
}