if (document.images){
		alt0 = new Image(429,379);
		alt0.src = "images/a_cranes.gif";
		
		alt1 = new Image(429,379);
		alt1.src = "images/cranes.jpg";
		
		alt2 = new Image(429,379);
		alt2.src = "images/track.jpg";
		
		alt3 = new Image(429,379);
		alt3.src = "images/camera_mounts.jpg";
		
		alt4 = new Image(429,379);
		alt4.src = "images/grip_equipment.jpg";
		
		alt5 = new Image(429,379);
		alt5.src = "images/huet.jpg";
		
		alt6 = new Image(429,379);
		alt6.src = "images/custom_work.jpg";
		
		
		cranes= new Image(160,29);
		cranes.src = "images/n_cranes.gif";
		craneson = new Image(160,29);
		craneson.src = "images/n_cranes_on.gif";
		
		track= new Image(160,29);
		track.src = "images/n_track.gif";
		trackon = new Image(160,29);
		trackon.src = "images/n_track_on.gif";
		
		camera_mounts= new Image(160,60);
		camera_mounts.src = "images/n_camera_mounts.gif";
		camera_mountson = new Image(160,60);
		camera_mountson.src = "images/n_camera_mounts_on.gif";
		
		grip_equipment= new Image(160,60);
		grip_equipment.src = "images/n_grip_equipment.gif";
		grip_equipmenton = new Image(160,60);
		grip_equipmenton.src = "images/n_grip_equipment_on.gif";
		
		huet= new Image(160,29);
		huet.src = "images/n_huet.gif";
		hueton = new Image(160,29);
		hueton.src = "images/n_huet_on.gif";
		
		custom_work= new Image(160,60);
		custom_work.src = "images/n_custom_work.gif";
		custom_workon = new Image(160,60);
		custom_workon.src = "images/n_custom_work_on.gif";

		}
		
		
		function imageChange(imageID,imageName,imageID2,imageName2) {
		if (document.images){
				document.images[imageID].src = eval(imageName + ".src");
				document.images[imageID2].src = eval(imageName2 + ".src");
			      }
		}
		
		
//main navigation
contact_us_on = new Image();  contact_us_on.src = "images/n_contact_us_on.gif";
contact_us_off = new Image(); contact_us_off.src = "images/n_contact_us.gif";

studio_login_on = new Image();  studio_login_on.src = "images/n_studio_login_on.gif";
studio_login_off = new Image(); studio_login_off.src = "images/n_studio_login.gif";

worldwide_on = new Image();  worldwide_on.src = "images/n_worldwide_on.gif";
worldwide_off = new Image(); worldwide_off.src = "images/n_worldwide.gif";

nav_cranes_on = new Image();  nav_cranes_on.src = "images/nav_cranes_on.gif";
nav_cranes_off = new Image(); nav_cranes_off.src = "images/nav_cranes.gif";

nav_tracks_on = new Image();  nav_tracks_on.src = "images/nav_tracks_on.gif";
nav_tracks_off = new Image(); nav_tracks_off.src = "images/nav_tracks.gif";

nav_camera_mounts_on = new Image();  nav_camera_mounts_on.src = "images/nav_camera_mounts_on.gif";
nav_camera_mounts_off = new Image(); nav_camera_mounts_off.src = "images/nav_camera_mounts.gif";

nav_grip_equipment_on = new Image();  nav_grip_equipment_on.src = "images/nav_grip_equipment_on.gif";
nav_grip_equipment_off = new Image(); nav_grip_equipment_off.src = "images/nav_grip_equipment.gif";

nav_huet_on = new Image();  nav_huet_on.src = "images/nav_huet_on.gif";
nav_huet_off = new Image(); nav_huet_off.src = "images/nav_huet.gif";

nav_custom_work_on = new Image();  nav_custom_work_on.src = "images/nav_custom_work_on.gif";
nav_custom_work_off = new Image(); nav_custom_work_off.src = "images/nav_custom_work.gif";

function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
    }
  }
}