//function for changing stylesheets
function pickStyles(title) {
  var t;
  var tr;
  //our smaller stylesheet has an explicit ID, we are getting calling that here
  tr = document.getElementById('eightBySix');
  //we are identifying the stylesheets by title
  t = tr.getAttribute("title");
  
  //we try to match up the stylesheet with the one being called by the functions param
 (t != title ? tr.disabled = true : tr.disabled = false);

}