compat = false;
if( parseInt( navigator.appVersion ) >= 3 ) { compat = true; }

// cache images for quick swapping
if( compat )
{
abouton = new Image;(130,26)
abouton.src ="images/about_over.gif";
aboutoff = new Image;(130,26)
aboutoff.src ="images/about.gif";

productson = new Image;(130,26)
productson.src ="images/products_over.gif";
productsoff = new Image;(130,26)
productsoff.src ="images/products.gif";

linkson = new Image;(130,26)
linkson.src ="images/links_over.gif";
linksoff = new Image;(130,26)
linksoff.src ="images/links.gif";

contacton = new Image;(130,26)
contacton.src ="images/contact_over.gif";
contactoff = new Image;(130,26)
contactoff.src ="images/contact.gif";
}

// swap images using the cached images
function brillar(x, y)
{
   if( compat ) { document.images[x].src=eval(y+'.src'); }
}