var j=parseInt(Math.random()*9);
  j=(isNaN(j))?0:j;

function writeHomeImage(){
  document.write('<img src="/hh/Portals/_default/Skins/HH/images/homephoto'+(j+1)+'.jpg" border="0">');
}

var k=parseInt(Math.random()*23);
  k=(isNaN(k))?0:k;

function writeSubImage(){
  document.write('<img src="/hh/Portals/_default/Skins/HH/images/subphoto'+(k+1)+'.jpg" border="0">');
}