img = new Array();
//2
img[0] = "top1";
img[1] = "top2";
img[2] = "top3";
img[3] = "chaba1";
img[4] = "humido1";
img[5] = "ikimo1";
img[6] = "keitaku1";
img[7] = "matusen1";
img[8] = "may1";
img[9] = "nakanomori1";
img[10] ="takenaka1";
img[11] ="kazu1";

n = Math.floor(Math.random()*img.length);