img=new Array();
img[0]="./i/top_ph/top_ph01.jpg";
img[1]="./i/top_ph/top_ph02.jpg";
img[2]="./i/top_ph/top_ph03.jpg";

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

document.write("<img src='"+img[n]+"' width='200' height='202' alt=''>");