if (document.images) { 
img1on = new Image();
img1on.src = "homebutton2.jpg"; 
img1off = new Image(); 
img1off.src = "homebutton.jpg"; 

img2on = new Image();
img2on.src = "uphbutton2.jpg"; 
img2off = new Image(); 
img2off.src = "uphbutton.jpg"; 

img3on = new Image();
img3on.src = "leatbutton2.jpg"; 
img3off = new Image(); 
img3off.src = "leatbutton.jpg"; 

img4on = new Image();
img4on.src = "occbutton2.jpg"; 
img4off = new Image(); 
img4off.src = "occbutton.jpg"; 

img5on = new Image();
img5on.src = "forbutton2.jpg"; 
img5off = new Image(); 
img5off.src = "forbutton.jpg"; 

img6on = new Image();
img6on.src = "casbutton2.jpg"; 
img6off = new Image(); 
img6off.src = "casbutton.jpg"; 

img7on = new Image();
img7on.src = "barbutton2.jpg"; 
img7off = new Image(); 
img7off.src = "barbutton.jpg"; 

img8on = new Image();
img8on.src = "adultbutton2.jpg"; 
img8off = new Image(); 
img8off.src = "adultbutton.jpg"; 

img9on = new Image();
img9on.src = "juvbutton2.jpg"; 
img9off = new Image(); 
img9off.src = "juvbutton.jpg"; 

img10on = new Image();
img10on.src = "matbutton2.jpg"; 
img10off = new Image(); 
img10off.src = "matbutton.jpg"; 

img11on = new Image();
img11on.src = "entbutton2.jpg"; 
img11off = new Image(); 
img11off.src = "entbutton.jpg"; 

img12on = new Image();
img12on.src = "offbutton2.jpg"; 
img12off = new Image(); 
img12off.src = "offbutton.jpg"; 

img13on = new Image();
img13on.src = "rugbutton2.jpg"; 
img13off = new Image(); 
img13off.src = "rugbutton.jpg"; 

img14on = new Image();
img14on.src = "probutton2.jpg"; 
img14off = new Image(); 
img14off.src = "probutton.jpg"; 

img15on = new Image();
img15on.src = "conbutton2.jpg"; 
img15off = new Image(); 
img15off.src = "conbutton.jpg"; 
}

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");}
}