bName = navigator.appName;
                bVer=parseInt(navigator.appVersion);
                if ((bName == "Netscape" && bVer>=3) ||
                (bName == "Microsoft Internet Explorer" && bVer >=3)) br="n3";
                else br="n2";
                //create image objects, preload all active and inactive images.
                if (br== "n3") {
                img01on = new Image();
                img01on.src= "searchON.gif";
                img02on = new Image();
                img02on.src= "contactON.gif";
                img03on = new Image();
                img03on.src= "site_mapON.gif";
                img04on = new Image();
                img04on.src= "mainON.gif";
                img05on = new Image();
                img05on.src= "aboutON.gif";
                img06on = new Image();
                img06on.src= "alumniON.gif";
                img07on = new Image();
                img07on.src= "deptsON.gif";
                img08on = new Image();
                img08on.src= "enrollON.gif";
                img09on = new Image();
                img09on.src= "peopleON.gif";
                img10on = new Image();
                img10on.src= "sportsON.gif";
                img11on = new Image();
                img11on.src= "studentON.gif";
                img12on = new Image();
                img12on.src= "acad_deptsON.gif";
                img13on = new Image();
                img13on.src= "programsON.gif";
                img14on = new Image();
                img14on.src= "catalog_dirON.gif";
                img01off = new Image();
                img01off.src= "search.gif";
                img02off = new Image();
                img02off.src= "contact.gif";
                img03off = new Image();
                img03off.src= "site_map.gif";
                img04off = new Image();
                img04off.src= "main.gif";
                img05off = new Image();
                img05off.src= "about.gif";
                img06off = new Image();
                img06off.src= "alumni.gif";
                img07off = new Image();
                img07off.src= "depts.gif";
                img08off = new Image();
                img08off.src= "enroll.gif";
                img09off = new Image();
                img09off.src= "people.gif";
                img10off = new Image();
                img10off.src= "sports.gif";
                img11off = new Image();
                img11off.src= "student.gif";
                img12off = new Image();
                img12off.src= "acad_depts.gif";
                img13off = new Image();
                img13off.src= "programs.gif";
                img14off = new Image();
                img14off.src= "catalog_dir.gif";
                }
                function imgAct(imgName) {
                if (br == "n3") {
                document[imgName].src = eval(imgName + "on.src");
                }
                }
                function imgInact(imgName) {
                if (br == "n3") {
                document[imgName].src = eval(imgName + "off.src");
                }
                }