var j,d="",l="",m="",p="",q="",z="",list= new Array()
  list[list.length]='img/random/tech_1.jpg';
  list[list.length]='img/random/tech_2.jpg';
  list[list.length]='img/random/tech_3.jpg';
  list[list.length]='img/random/tech_4.jpg';
  list[list.length]='img/random/tech_5.jpg';
  list[list.length]='img/random/tech_6.jpg';
  list[list.length]='img/random/tech_7.jpg';
  list[list.length]='img/random/tech_8.jpg';
  j=parseInt(Math.random()*list.length);
  j=(isNaN(j))?0:j;
    document.write("<img src='"+list[j]+"'>");