var nav_solutionsoverview_off = new Image();
  nav_solutionsoverview_off.src = "/images/nav_solutionsoverview_off.gif";
  var nav_solutionsoverview_over = new Image();
  nav_solutionsoverview_over.src = "/images/nav_solutionsoverview_over.gif";

  var nav_trainingtutorials_off = new Image();
  nav_trainingtutorials_off.src = "/images/nav_trainingtutorials_off.gif";
  var nav_trainingtutorials_over = new Image();
  nav_trainingtutorials_over.src = "/images/nav_trainingtutorials_over.gif";

  var nav_profservices_off = new Image();
  nav_profservices_off.src = "/images/nav_profservices_off.gif";
  var nav_profservices_over = new Image();
  nav_profservices_over.src = "/images/nav_profservices_over.gif";
  
  var nav_demos_off = new Image();
  nav_demos_off.src = "/images/nav_demos_off.gif";
  var nav_demos_over = new Image();
  nav_demos_over.src = "/images/nav_demos_over.gif";

  var nav_solutionsdownloads_off = new Image();
  nav_solutionsdownloads_off.src = "/images/nav_solutionsdownloads_off.gif";
  var nav_solutionsdownloads_over = new Image();
  nav_solutionsdownloads_over.src = "/images/nav_solutionsdownloads_over.gif";

  var nav_appdirser_off = new Image();
  nav_appdirser_off.src = "/images/nav_appdirser_off.gif";
  var nav_appdirser_over = new Image();
  nav_appdirser_over.src = "/images/nav_appdirser_over.gif";