if (document.images) {
img1on=new Image (); img1on.src="images/gtb_homepage_on.gif";
img1off=new Image (); img1off.src="images/gtb_homepage_off.gif";
img2on=new Image (); img2on.src="images/gtb_calendar_on.gif";
img2off=new Image (); img2off.src="images/gtb_calendar_off.gif";
img3on=new Image (); img3on.src="images/gtb_about_on.gif";
img3off=new Image (); img3off.src="images/gtb_about_off.gif";
img4on=new Image (); img4on.src="images/gtb_history_on.gif";
img4off=new Image (); img4off.src="images/gtb_history_off.gif";
img5on=new Image (); img5on.src="images/gtb_ministries_on.gif";
img5off=new Image (); img5off.src="images/gtb_ministries_off.gif";
img6on=new Image (); img6on.src="images/gtb_missions_on.gif";
img6off=new Image (); img6off.src="images/gtb_missions_off.gif";
img7on=new Image (); img7on.src="images/gtb_festival_on.gif";
img7off=new Image (); img7off.src="images/gtb_festival_off.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");
}
}