var rand1 = 0;
var useRand = 0;

images = new Array;
images[1] = new Image();
images[1].src = "lit_window.jpg";
images[2] = new Image();
images[2].src = "unlit_window.jpg";
images[3] = new Image();
images[3].src = "lit_door.jpg";
images[4] = new Image();
images[4].src = "unlit_door.jpg";

function randSwapPic() {
var imgnum = images.length - 1;
do {
var randnum = Math.random();
rand1 = Math.round((imgnum - 1) * randnum) + 1;
} while (rand1 == useRand);
useRand = rand1;
document.randimg.src = images[useRand].src;
}

function tl_click(){
if (document.tl_window.src == images[1].src)
	document.tl_window.src = images[2].src;

else if (document.tl_window.src == images[2].src)
	document.tl_window.src = images[1].src;
tm();
bl();
}

function tm_click(){
if (document.tm_window.src == images[1].src)
	document.tm_window.src = images[2].src;

else if (document.tm_window.src == images[2].src)
	document.tm_window.src = images[1].src;
tl();
tr();
mm();
}

function tr_click(){
if (document.tr_window.src == images[1].src)
	document.tr_window.src = images[2].src;

else if (document.tr_window.src == images[2].src)
	document.tr_window.src = images[1].src;
tm();
mr();
}

function ml_click(){
if (document.ml_window.src == images[1].src)
	document.ml_window.src = images[2].src;

else if (document.ml_window.src == images[2].src)
	document.ml_window.src = images[1].src;
tl();
bl();
mm();
}

function mm_click(){
if (document.mm_window.src == images[1].src)
	document.mm_window.src = images[2].src;

else if (document.mm_window.src == images[2].src)
	document.mm_window.src = images[1].src;
tm();
ml();
mr();
bm();
}

function mr_click(){
if (document.mr_window.src == images[1].src)
	document.mr_window.src = images[2].src;

else if (document.mr_window.src == images[2].src)
	document.mr_window.src = images[1].src;
tr();
mm();
br();
}

function bl_click(){
if (document.bl_window.src == images[1].src)
	document.bl_window.src = images[2].src;

else if (document.bl_window.src == images[2].src)
	document.bl_window.src = images[1].src;
ml();
bm();
}

function bm_click(){
if (document.door.src == images[3].src)
	document.door.src = images[4].src;

else if (document.door.src == images[4].src)
	document.door.src = images[3].src;
bl();
br();
mm();
}

function br_click(){
if (document.br_window.src == images[1].src)
	document.br_window.src = images[2].src;

else if (document.br_window.src == images[2].src)
	document.br_window.src = images[1].src;
mr();
bm();
}
////////////////////////////////////////////////////////////////////
function tl(){
if (document.tl_window.src == images[1].src)
	document.tl_window.src = images[2].src;

else if (document.tl_window.src == images[2].src)
	document.tl_window.src = images[1].src;
}

function tm(){
if (document.tm_window.src == images[1].src)
	document.tm_window.src = images[2].src;

else if (document.tm_window.src == images[2].src)
	document.tm_window.src = images[1].src;
}

function tr(){
if (document.tr_window.src == images[1].src)
	document.tr_window.src = images[2].src;

else if (document.tr_window.src == images[2].src)
	document.tr_window.src = images[1].src;
}

function ml(){
if (document.ml_window.src == images[1].src)
	document.ml_window.src = images[2].src;

else if (document.ml_window.src == images[2].src)
	document.ml_window.src = images[1].src;
}

function mm(){
if (document.mm_window.src == images[1].src)
	document.mm_window.src = images[2].src;

else if (document.mm_window.src == images[2].src)
	document.mm_window.src = images[1].src;
}

function mr(){
if (document.mr_window.src == images[1].src)
	document.mr_window.src = images[2].src;

else if (document.mr_window.src == images[2].src)
	document.mr_window.src = images[1].src;
}

function bl(){
if (document.bl_window.src == images[1].src)
	document.bl_window.src = images[2].src;

else if (document.bl_window.src == images[2].src)
	document.bl_window.src = images[1].src;
}

function bm(){
if (document.door.src == images[3].src)
	document.door.src = images[4].src;

else if (document.door.src == images[4].src)
	document.door.src = images[3].src;
}

function br(){
if (document.br_window.src == images[1].src)
	document.br_window.src = images[2].src;

else if (document.br_window.src == images[2].src)
	document.br_window.src = images[1].src;
}