var i=Math.random();
var l=Math.floor((i*5)+1);
var imageselected = new String(window.location);
x = imageselected.indexOf('&imageselected');
if(x!=-1) {
  imageselected = imageselected.substr(x+15, x+15);
  l=imageselected;
}
document.write('<img src="/images/bigimage'+l+'.jpg" width="767" height="327" alt=""></td>');