if (document.images) {
  //var defImg = "northspineaerial";

var nsspinemodeloff = new Image(); nsspinemodeloff.src = "campus/northspine/images/nsspinecampusmodel-tn.jpg";
var nsspinemodelon = new Image(); nsspinemodelon.src = "campus/northspine/images/nsspinecampusmodel-tn-close.jpg";
var northspineaerialoff = new Image(); northspineaerialoff.src = "campus/northspine/images/northspine2-tn.jpg";
var northspineaerialon = new Image(); northspineaerialon.src = "campus/northspine/images/northspine2-tn-close.jpg";
var nsrooftopoff = new Image(); nsrooftopoff.src = "campus/northspine/images/northspinerooftop-tn.jpg";
var nsrooftopon = new Image(); nsrooftopon.src = "campus/northspine/images/northspinerooftop-tn-close.jpg";
var northspineoff = new Image(); northspineoff.src = "campus/northspine/images/northspine-tn.jpg";
var northspineon = new Image(); northspineon.src = "campus/northspine/images/northspine-tn-close.jpg";
var lib1canAoff = new Image(); lib1canAoff.src = "campus/northspine/images/librarycanteenA-tn.jpg";
var lib1canAon = new Image(); lib1canAon.src = "campus/northspine/images/librarycanteenA-tn-close.jpg";
var lib1off = new Image(); lib1off.src = "campus/northspine/images/library1-tn.jpg";
var lib1on = new Image(); lib1on.src = "campus/northspine/images/library1-tn-close.jpg";
var adminbldgoff = new Image(); adminbldgoff.src = "campus/northspine/images/adminbldg-tn.jpg";
var adminbldgon = new Image(); adminbldgon.src = "campus/northspine/images/adminbldg-tn-close.jpg";
var lt1off = new Image(); lt1off.src = "campus/northspine/images/lt1northspine-tn.jpg";
var lt1on = new Image(); lt1on.src = "campus/northspine/images/lt1northspine-tn-close.jpg";
var tutorialoff = new Image(); tutorialoff.src = "campus/northspine/images/tutorialroom-tn.jpg";
var tutorialon = new Image(); tutorialon.src = "campus/northspine/images/tutorialroom-tn-close.jpg";

var southspineoff = new Image(); southspineoff.src = "campus/southspine/images/southspine-tn.jpg";
var southspineon = new Image(); southspineon.src = "campus/southspine/images/southspine-tn-close.jpg";
var canBoff = new Image(); canBoff.src = "campus/southspine/images/southspinecanteenb-tn.jpg";
var canBon = new Image(); canBon.src = "campus/southspine/images/southspinecanteenb-tn-close.jpg";
var mltpaintingoff = new Image(); mltpaintingoff.src = "campus/southspine/images/mltentrance-tn.jpg";
var mltpaintingon = new Image(); mltpaintingon.src = "campus/southspine/images/mltentrance-tn-close.jpg";
var mltoff = new Image(); mltoff.src = "campus/southspine/images/mlt-tn.jpg";
var mlton = new Image(); mlton.src = "campus/southspine/images/mlt-tn-close.jpg";

var hall1off = new Image(); hall1off.src = "campus/halls/images/hall1-tn.jpg";
var hall1on = new Image(); hall1on.src = "campus/halls/images/hall1-tn-close.jpg";
var hall4off = new Image(); hall4off.src = "campus/halls/images/hall4-tn.jpg";
var hall4on = new Image(); hall4on.src = "campus/halls/images/hall4-tn-close.jpg";
var hall5off = new Image(); hall5off.src = "campus/halls/images/hall5entrance-tn.jpg";
var hall5on = new Image(); hall5on.src = "campus/halls/images/hall5entrance-tn-close.jpg";
var hall6off = new Image(); hall6off.src = "campus/halls/images/Hall6-tn.jpg";
var hall6on = new Image(); hall6on.src = "campus/halls/images/Hall6-tn-close.jpg";
var hall7off = new Image(); hall7off.src = "campus/halls/images/hall7-tn.jpg";
var hall7on = new Image(); hall7on.src = "campus/halls/images/hall7-tn-close.jpg";
var halls8to11off = new Image(); halls8to11off.src = "campus/halls/images/halls8-11-tn.jpg";
var halls8to11on = new Image(); halls8to11on.src = "campus/halls/images/halls8-11-tn-close.jpg";
var hall8walkwayoff = new Image(); hall8walkwayoff.src = "campus/halls/images/hall8tolibrary1-tn.jpg";
var hall8walkwayon = new Image(); hall8walkwayon.src = "campus/halls/images/hall8tolibrary1-tn-close.jpg";
var hall9n10off = new Image(); hall9n10off.src = "campus/halls/images/halls9-10-tn.jpg";
var hall9n10on = new Image(); hall9n10on.src = "campus/halls/images/halls9-10-tn-close.jpg";
var hall10off = new Image(); hall10off.src = "campus/halls/images/hall10-tn.jpg";
var hall10on = new Image(); hall10on.src = "campus/halls/images/hall10-tn-close.jpg";

var ntugateoff = new Image(); ntugateoff.src = "campus/others/images/ntugate-tn.jpg";
var ntugateon = new Image(); ntugateon.src = "campus/others/images/ntugate-tn-close.jpg";
var chinesehcoff = new Image(); chinesehcoff.src = "campus/others/images/chheritagectr-tn.jpg";
var chinesehcon = new Image(); chinesehcon.src = "campus/others/images/chheritagectr-tn-close.jpg";
var yunaangardenoff = new Image(); yunaangardenoff.src = "campus/others/images/yunaangarden-tn.jpg";
var yunaangardenon = new Image(); yunaangardenon.src = "campus/others/images/yunaangarden-tn-close.jpg";
var srcoff = new Image(); srcoff.src = "campus/others/images/swimmingpool-tn.jpg";
var srcon = new Image(); srcon.src = "campus/others/images/swimmingpool-tn-close.jpg";
var nanyangaudioff = new Image(); nanyangaudioff.src = "campus/others/images/nanyangauditorium-tn.jpg";
var nanyangaudion = new Image(); nanyangaudion.src = "campus/others/images/nanyangauditorium-tn-close.jpg";
var scsoff = new Image(); scsoff.src = "campus/others/images/scs-tn.jpg";
var scson = new Image(); scson.src = "campus/others/images/scs-tn-close.jpg";
var scsstudiooff = new Image(); scsstudiooff.src = "campus/others/images/scsvideostudio-tn.jpg";
var scsstudioon = new Image(); scsstudioon.src = "campus/others/images/scsvideostudio-tn-close.jpg";
var adannexestairsoff = new Image(); adannexestairsoff.src = "campus/others/images/adminannexestairs-tn.jpg";
var adannexestairson = new Image(); adannexestairson.src = "campus/others/images/adminannexestairs-tn-close.jpg";
var roadoff = new Image(); roadoff.src = "campus/others/images/road-tn.jpg";
var roadon = new Image(); roadon.src = "campus/others/images/road-tn-close.jpg";

var nieplazaoff = new Image(); nieplazaoff.src = "campus/nie/images/nie_triangle-tn.jpg";
var nieplazaon = new Image(); nieplazaon.src = "campus/nie/images/nie_triangle-tn-close.jpg";
var niepooloff = new Image(); niepooloff.src = "campus/nie/images/nieswimmingpool-tn.jpg";
var niepoolon = new Image(); niepoolon.src = "campus/nie/images/nieswimmingpool-tn-close.jpg";
var nieliboff = new Image(); nieliboff.src = "campus/nie/images/nielibrary-tn.jpg";
var nielibon = new Image(); nielibon.src = "campus/nie/images/nielibrary-tn-close.jpg";
}