if (document.images) {
 staff_on = new Image(); staff_on.src = "images/nav/main_topmenu_staff_on.gif";
 staff_off = new Image(); staff_off.src = "images/nav/main_topmenu_staff_off.gif";
 sites_on = new Image(); sites_on.src = "images/nav/main_topmenu_sites_on.gif";
 sites_off = new Image(); sites_off.src = "images/nav/main_topmenu_sites_off.gif";
 contact_on = new Image(); contact_on.src = "images/nav/main_topmenu_contact_on.gif";
 contact_off = new Image(); contact_off.src = "images/nav/main_topmenu_contact_off.gif";
 careers_on = new Image(); careers_on.src = "images/nav/main_topmenu_careers_on.gif";
 careers_off = new Image(); careers_off.src = "images/nav/main_topmenu_careers_off.gif";

 arrow1_on = new Image(); arrow1_on.src = "images/nav/main_mainmenu_arrow_on.gif";
 arrow1_off = new Image(); arrow1_off.src = "images/nav/main_mainmenu_arrow_off.gif";
 immigrant_on = new Image(); immigrant_on.src = "images/nav/main_mainmenu_immigrant_on.gif";
 immigrant_off = new Image(); immigrant_off.src = "images/nav/main_mainmenu_immigrant_off.gif";
 arrow2_on = new Image(); arrow2_on.src = "images/nav/main_mainmenu_arrow_on.gif";
 arrow2_off = new Image(); arrow2_off.src = "images/nav/main_mainmenu_arrow_off.gif";
 nonimmigrant_on = new Image(); nonimmigrant_on.src = "images/nav/main_mainmenu_nonimmigrant_on.gif";
 nonimmigrant_off = new Image(); nonimmigrant_off.src = "images/nav/main_mainmenu_nonimmigrant_off.gif";
 arrow3_on = new Image(); arrow3_on.src = "images/nav/main_mainmenu_arrow_on.gif";
 arrow3_off = new Image(); arrow3_off.src = "images/nav/main_mainmenu_arrow_off.gif";
 detention_on = new Image(); detention_on.src = "images/nav/main_mainmenu_detention_on.gif";
 detention_off = new Image(); detention_off.src = "images/nav/main_mainmenu_detention_off.gif";
 arrow4_on = new Image(); arrow4_on.src = "images/nav/main_mainmenu_arrow_on.gif";
 arrow4_off = new Image(); arrow4_off.src = "images/nav/main_mainmenu_arrow_off.gif";
 citizenship_on = new Image(); citizenship_on.src = "images/nav/main_mainmenu_citizenship_on.gif";
 citizenship_off = new Image(); citizenship_off.src = "images/nav/main_mainmenu_citizenship_off.gif";
 arrow5_on = new Image(); arrow5_on.src = "images/nav/main_mainmenu_arrow_on.gif";
 arrow5_off = new Image(); arrow5_off.src = "images/nav/main_mainmenu_arrow_off.gif";
 passports_on = new Image(); passports_on.src = "images/nav/main_mainmenu_passports_on.gif";
 passports_off = new Image(); passports_off.src = "images/nav/main_mainmenu_passports_off.gif";
 english_on = new Image(); english_on.src = "images/main_english_on.gif";
 english_off = new Image(); english_off.src = "images/main_english_off.gif";
 spanish_on = new Image(); spanish_on.src = "images/main_spanish_on.gif";
 spanish_off = new Image(); spanish_off.src = "images/main_spanish_off.gif";
 }

function turnOn(imageName) {
 if (document.images) {
  document[imageName].src = eval(imageName + "_on.src");
  }
 }

function turnOff(imageName) {
 if (document.images) {
  document[imageName].src = eval(imageName + "_off.src");
  }
 }

function toggle(objectID) {
 var object = document.getElementById(objectID);
 if (object.style.display =='block')  object.style.display='none';
 else object.style.display='block';
 return;
}