var backImage = new Array();

backImage[0] = "redstone_0.jpg";
backImage[1] = "redstone_1.jpg";
backImage[2] = "redstone_2.jpg";
backImage[3] = "redstone_3.jpg";
backImage[4] = "redstone_4.jpg";
backImage[5] = "redstone_5.jpg";
backImage[6] = "redstone_6.jpg";
backImage[7] = "redstone_7.jpg";
backImage[8] = "redstone_8.jpg";
backImage[9] = "redstone_9.jpg";
backImage[10] = "redstone_10.jpg";


function changeBGImage(whichImage){
if (document.body){
document.body.background = backImage[whichImage];
}
}