var j=parseInt(Math.random()*2);
  j=(isNaN(j))?0:j;

function writeTopImage(){
  list = new Array();
  list[list.length]='images/FallMEHeader.jpg';
  list[list.length]='images/FallSSPHeader.jpg';
  document.write("<img src='"+list[j]+"' border='0' width='536' height='148' />");
}