if (document.images) {
    
	topnav_home_on = new Image();
    topnav_home_on.src = "/images/topnav_home_highlighted.gif";
	topnav_home_off = new Image();
    topnav_home_off.src = "/images/topnav_home_normal.gif";
	
	topnav_prodserv_on = new Image();
    topnav_prodserv_on.src = "/images/topnav_prodserv_highlighted.gif";
	topnav_prodserv_off = new Image();
    topnav_prodserv_off.src = "/images/topnav_prodserv_normal.gif";
	
	topnav_education_on = new Image();
    topnav_education_on.src = "/images/topnav_education_highlighted.gif";
	topnav_education_off = new Image();
    topnav_education_off.src = "/images/topnav_education_normal.gif";
	
	topnav_media_on = new Image();
    topnav_media_on.src = "/images/topnav_media_highlighted.gif";
	topnav_media_off = new Image();
    topnav_media_off.src = "/images/topnav_media_normal.gif";
	
	topnav_about_on = new Image();
    topnav_about_on.src = "/images/topnav_about_highlighted.gif";
	topnav_about_off = new Image();
    topnav_about_off.src = "/images/topnav_about_normal.gif";
	
	topnav_help_on = new Image();
    topnav_help_on.src = "/images/topnav_help_highlighted.gif";
	topnav_help_off = new Image();
    topnav_help_off.src = "/images/topnav_help_normal.gif";
  
    menu_prodserv_up = new Image();
    menu_prodserv_up.src = "/images/leftnav_prodserv_up.gif";
    menu_prodserv_down = new Image();
    menu_prodserv_down.src = "/images/leftnav_prodserv_down.gif";
	
    menu_education_up = new Image();
    menu_education_up.src = "/images/leftnav_education_up.gif";
    menu_education_down = new Image();
    menu_education_down.src = "/images/leftnav_education_down.gif";
	
    menu_subinfo_up = new Image();
    menu_subinfo_up.src = "/images/leftnav_subscription_up.gif";
    menu_subinfo_down = new Image();
    menu_subinfo_down.src = "/images/leftnav_subscription_down.gif";
	
    menu_about_up = new Image();
    menu_about_up.src = "/images/leftnav_about_up.gif";
    menu_about_down = new Image();
    menu_about_down.src = "/images/leftnav_about_down.gif";
	
    menu_help_up = new Image();
    menu_help_up.src = "/images/leftnav_help_up.gif";
    menu_help_down = new Image();
    menu_help_down.src = "/images/leftnav_help_down.gif";
	
    menu_account_up = new Image();
    menu_account_up.src = "/images/leftnav_account_up.gif";
    menu_account_down = new Image();
    menu_account_down.src = "/images/leftnav_account_down.gif";	
  }

  function menuClick(imageName) {
    if (document.images) {
	  if ( document[imageName].src.substring((document[imageName].src.length-8)) == "down.gif" ) {
	    document[imageName].src = eval(imageName + "_up.src");
		eval(imageName + "Layer").display();
	  } else {
	    document[imageName].src = eval(imageName + "_down.src");
		eval(imageName + "Layer").remove();
	  }
    }
  }
  
  function swap(imageName, action) {
    if (document.images) {
      document[imageName].src = eval(imageName + "_" + action + ".src");
    }
  }