var j=parseInt(Math.random()*12);
  j=(isNaN(j))?0:j;

function writeHomeImage(){
  list = new Array();
  list[list.length]='images/home_photo1.jpg';
  list[list.length]='images/home_photo2.jpg';
  list[list.length]='images/home_photo3.jpg';
  list[list.length]='images/home_photo4.jpg';
  list[list.length]='images/home_photo5.jpg';
  list[list.length]='images/home_photo6.jpg';
  list[list.length]='images/home_photo7.jpg';
  list[list.length]='images/home_photo8.jpg';
  list[list.length]='images/home_photo9.jpg';
  list[list.length]='images/home_photo10.jpg';
  list[list.length]='images/home_photo11.jpg';
  list[list.length]='images/home_photo12.jpg';
  
  
  document.write('<img src="'+list[j]+'" border="0">');
}

 var k=parseInt(Math.random()*12);
  k=(isNaN(k))?0:k;

function writeTopImage(){
  tlist = new Array();
  tlist[tlist.length]='images/top_photo1.jpg';
  tlist[tlist.length]='images/top_photo2.jpg';
  tlist[tlist.length]='images/top_photo3.jpg';
  tlist[tlist.length]='images/top_photo4.jpg';
  tlist[tlist.length]='images/top_photo5.jpg';
  tlist[tlist.length]='images/top_photo6.jpg';
  tlist[tlist.length]='images/top_photo7.jpg';
  tlist[tlist.length]='images/top_photo8.jpg';
  tlist[tlist.length]='images/top_photo9.jpg';
  tlist[tlist.length]='images/top_photo10.jpg';
  tlist[tlist.length]='images/top_photo11.jpg';
  tlist[tlist.length]='images/top_photo12.jpg';
  document.write('<img src="'+tlist[k]+'" border="0">');
}

 var m=parseInt(Math.random()*12);
  m=(isNaN(m))?0:m;

function writeSubImage(){
  mlist = new Array();
  mlist[mlist.length]='images/sub_photo1.jpg';
  mlist[mlist.length]='images/sub_photo2.jpg';
  mlist[mlist.length]='images/sub_photo3.jpg';
  mlist[mlist.length]='images/sub_photo4.jpg';
  mlist[mlist.length]='images/sub_photo5.jpg';
  mlist[mlist.length]='images/sub_photo6.jpg';
  mlist[mlist.length]='images/sub_photo7.jpg';
  mlist[mlist.length]='images/sub_photo8.jpg';
  mlist[mlist.length]='images/sub_photo9.jpg';
  mlist[mlist.length]='images/sub_photo10.jpg';
  mlist[mlist.length]='images/sub_photo11.jpg';
  mlist[mlist.length]='images/sub_photo12.jpg';
  document.write('<img src="'+mlist[m]+'" border="0">');
}