if (document.images) {

// preload inactive images
nav1= new Image();
nav1.src="home.png";

nav2 = new Image();
nav2.src="aboutus.png";

nav3 = new Image();
nav3.src="store.png";

nav4=new Image();
nav4.src="sermons.png";

nav5= new Image();
nav5.src="gallery.png";

nav6=new Image();
nav6.src="needs.png";

nav7=new Image();
nav7.src="newsletters.png";

nav8=new Image();
nav8.src="links.png";

email=new Image();
email.src="email.png";

marriage= new Image();
marriage.src="marriage.png";

family= new Image();
family.src="family.png";

band=new Image();
band.src="band.png";

// preload active images
nav1on= new Image();
nav1on.src="home2.png";

nav2on = new Image();
nav2on.src = "aboutus2.png";

nav3on = new Image();
nav3on.src = "store2.png";

nav4on=new Image();
nav4on.src="sermons2.png";

nav5on= new Image();
nav5on.src = "gallery2.png";

nav6on=new Image();
nav6on.src="needs2.png";

nav7on=new Image();
nav7on.src="newsletters2.png";

nav8on=new Image();
nav8on.src="links2.png";

emailon=new Image();
emailon.src="email2.png";

marriageon=new Image();
marriageon.src="marriage2.png";

familyon=new Image();
familyon.src="family2.png";

bandon=new Image();
bandon.src="band2.png";

}

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

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