if (document.images) { 

var img1on = new Image();
img1on.src = "../images/btn_home_on.gif"; 
var img1off = new Image();
img1off.src = "../images/btn_home.gif";

var img2on = new Image();
img2on.src = "../images/btn_profile_on.gif";
var img2off = new Image();
img2off.src = "../images/btn_profile.gif";

var img3on = new Image();
img3on.src = "../images/btn_monado_on.gif";
var img3off = new Image();
img3off.src = "../images/btn_monado.gif";

var img4on = new Image();
img4on.src = "../images/btn_product_on.gif";
var img4off = new Image();
img4off.src = "../images/btn_product.gif";

var img5on = new Image();
img5on.src = "../images/btn_link_on.gif"; 
var img5off = new Image();
img5off.src = "../images/btn_link.gif";

var img6on = new Image();
img6on.src = "../images/btn_blog_on.gif";
var img6off = new Image();
img6off.src = "../images/btn_blog.gif";



} 


function On(name) { 

if (document.images) { 
document.images[name].src = eval(name + 'on.src'); 
} 

} 


function Off(name) { 

if (document.images) { 
document.images[name].src = eval(name + 'off.src'); 
} 

}