m1on = new Image(0,0);
m1on.src = 'images/5b.gif';
m1off = new Image(0,0);
m1off.src = 'images/5a.gif';

m2on = new Image(0,0);
m2on.src = 'images/6b.gif';
m2off = new Image(0,0);
m2off.src = 'images/6a.gif';

m3on = new Image(0,0);
m3on.src = 'images/7b.gif';
m3off = new Image(0,0);
m3off.src = 'images/7a.gif';

m4on = new Image(0,0);
m4on.src = 'images/8b.gif';
m4off = new Image(0,0);
m4off.src = 'images/8a.gif';

m5on = new Image(0,0);
m5on.src = 'images/9b.gif';
m5off = new Image(0,0);
m5off.src = 'images/9a.gif';

m6on = new Image(0,0);
m6on.src = 'images/10b.gif';
m6off = new Image(0,0);
m6off.src = 'images/10a.gif';

m7on = new Image(0,0);
m7on.src = 'images/m7b.gif';
m7off = new Image(0,0);
m7off.src = 'images/m7a.gif';

m8on = new Image(0,0);
m8on.src = 'images/m8b.gif';
m8off = new Image(0,0);
m8off.src = 'images/m8a.gif';

h1on = new Image(0,0);
h1on.src = 'images/15b.gif';
h1off = new Image(0,0);
h1off.src = 'images/15.gif';

imgyon = new Image(0,0);
imgyon.src = 'images/yes2.gif';
imgyoff = new Image(0,0);
imgyoff.src = 'images/yes1.gif';

map3on = new Image(0,0);
map3on.src = 'images/m3c.gif';
map3off = new Image(0,0);
map3off.src = 'images/m3g.gif';

map2on = new Image(0,0);
map2on.src = 'images/m2c.gif';
map2off = new Image(0,0);
map2off.src = 'images/m2g.gif';

map1on = new Image(0,0);
map1on.src = 'images/m1c.gif';
map1off = new Image(0,0);
map1off.src = 'images/m1g.gif';

M1 = new Image(0,0);
M1.src = 'images/m1b.gif';
M2 = new Image(0,0);
M2.src = 'images/m2b.gif';
M3 = new Image(0,0);
M3.src = 'images/m3b.gif';

function changeImgOn(imgName){

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

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

function showMap(imgno){
  imgMap=eval("M" + imgno + ".src");
   document["BigM"].src = imgMap;
}