if (document.images) {
            img1on = new Image(); 
            img1on.src = "/TravelPlannerBCBase/wrap/theme0/images/nav.lodging.on.gif";   
            img2on = new Image();
            img2on.src = "/TravelPlannerBCBase/wrap/theme0/images/nav.winter.activities.on.gif";
            img3on = new Image();
            img3on.src = "/TravelPlannerBCBase/wrap/theme0/images/nav.summer.activities.on.gif";
            img4on = new Image();
            img4on.src = "/TravelPlannerBCBase/wrap/theme0/images/nav.town.on.gif";
            img5on = new Image();
            img5on.src = "/TravelPlannerBCBase/wrap/theme0/images/nav.calendar.on.gif";
		  
            img1off = new Image(); 
            img1off.src = "/TravelPlannerBCBase/wrap/theme0/images/nav.lodging.gif";   
            img2off = new Image();
            img2off.src = "/TravelPlannerBCBase/wrap/theme0/images/nav.winter.activities.gif";
            img3off = new Image();
            img3off.src = "/TravelPlannerBCBase/wrap/theme0/images/nav.summer.activities.gif";
            img4off = new Image();
            img4off.src = "/TravelPlannerBCBase/wrap/theme0/images/nav.town.gif";
            img5off = new Image();
            img5off.src = "/TravelPlannerBCBase/wrap/theme0/images/nav.calendar.gif";
       }

function imgOn(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "on.src");
        }
}

function imgOff(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "off.src");
        }
}