window.onload = function() {
 if(document.getElementById) {
  var parent = document.getElementById('bodyLeft'); 
  var child1 = document.getElementById('content');
  var child2 = document.getElementById('leftMenu');
  parent.removeChild(child1);
  parent.removeChild(child2);
  parent.appendChild(child2);
  parent.appendChild(child1);
 }
}