// pre-load all navigation images

          if (document.images) {
		  
			// Nav items for Using UTV
			// Section 4.1
			tipsandtrickson = new Image();   tipsandtrickson.src = "images/nav/4.1TipsTricks_Ovr.gif";
			tipsandtricksoff = new Image();   tipsandtricksoff.src = "images/nav/4.1TipsTricks_Off.gif";
			upgradeson = new Image();   upgradeson.src = "images/nav/4.2Upgrades_Ovr.gif";
			upgradesoff = new Image();   upgradesoff.src = "images/nav/4.2Upgrades_Off.gif";
			userforumon = new Image();   userforumon.src = "images/nav/4.3UserForum_Ovr.gif";
			userforumoff = new Image();   userforumoff.src = "images/nav/4.3UserForum_Off.gif";
			// Section 4.2
			setupinstallon = new Image();   setupinstallon.src = "images/nav/4.2InstallSetup_Ovr.gif";
			setupinstalloff = new Image();   setupinstalloff.src = "images/nav/4.2InstallSetup_Off.gif";
			usinginstallon = new Image();   usinginstallon.src = "images/nav/4.2.1Installation_Ovr.gif";
			usinginstalloff = new Image();   usinginstalloff.src = "images/nav/4.2.1Installation_Off.gif";
			usingsetupon = new Image();   usingsetupon.src = "images/nav/4.2.2SettingUpYour_Ovr.gif";
			usingsetupoff = new Image();   usingsetupoff.src = "images/nav/4.2.2SettingUpYour_Off.gif";
			setupactivationon = new Image();   setupactivationon.src = "images/nav/4.2.3AccActivation_Ovr.gif";
			setupactivationoff = new Image();   setupactivationoff.src = "images/nav/4.2.3AccActivation_Off.gif";
			// Section 4.3
			userguideson = new Image();   userguideson.src = "images/nav/4.3UserGuides_Ovr.gif";
			userguidesoff = new Image();   userguidesoff.src = "images/nav/4.3UserGuides_Off.gif";
			// Section 4.4
			usingremoteon = new Image();   usingremoteon.src = "images/nav/4.4UsingYourRemote_Ovr.gif";
			usingremoteoff = new Image();   usingremoteoff.src = "images/nav/4.4UsingYourRemote_Off.gif";
			rcaremoteon = new Image();   rcaremoteon.src = "images/nav/4.4.1RCARemote_Ovr.gif";
			rcaremoteoff = new Image();   rcaremoteoff.src = "images/nav/4.4.1RCARemote_Off.gif";
			sonyremoteon = new Image();   sonyremoteon.src = "images/nav/4.4.2SonyRemote_Ovr.gif";
			sonyremoteoff = new Image();   sonyremoteoff.src = "images/nav/4.4.2SonyRemote_Off.gif";
			// Section 4.5
			usingquestionson = new Image();   usingquestionson.src = "images/nav/4.5CommonQ_Ovr.gif";
			usingquestionsoff = new Image();   usingquestionsoff.src = "images/nav/4.5CommonQ_Off.gif";
			
          }