if ( document.images) {  //call pre-load of images
var a0_on  = new Image();
var a0_off  = new Image();
var a1_on  = new Image();
var a1_off  = new Image();
var a2_on  = new Image();
var a2_off  = new Image();
var a3_on  = new Image();
var a3_off  = new Image();
var a4_on  = new Image();
var a4_off  = new Image();
var a5_on  = new Image();
var a5_off  = new Image();
var a6_on  = new Image();
var a6_off  = new Image();
var a7_on  = new Image();
var a7_off  = new Image();
var a8_on  = new Image();
var a8_off  = new Image();
var a9_on  = new Image();
var a9_off  = new Image();
var a10_on  = new Image();
var a10_off  = new Image();
var a11_on  = new Image();
var a11_off  = new Image();
var a12_on  = new Image();
var a12_off  = new Image();
}

function preLoad() {
//if ( document.images) {  //pre-load images
a0_on.src = "adverto.gif";  <!--Copperplate Gothic Bold Size 20, #008000+#FF8408 -->
a0_off.src = "advert.gif";
a1_on.src = "contacto2.gif";
a1_off.src = "contact2.gif";
a2_on.src = "privacyo2.gif";
a2_off.src = "privacy2.gif";
a3_on.src = "designo2.gif";
a3_off.src = "design2.gif";
a4_on.src = "scano.gif";
a4_off.src = "scan.gif";
a5_on.src = "contento.gif";
a5_off.src = "content.gif";
a6_on.src = "index.gif";
a6_off.src = "indexo.gif";
a7_on.src = "termso.gif";
a7_off.src = "terms.gif";
a8_on.src = "consulto.gif";
a8_off.src = "consult.gif";
a9_on.src = "helpo.gif";
a9_off.src = "help.gif";
a10_on.src = "findo.gif";
a10_off.src = "find.gif";
a11_on.src = "abouto.gif";
a11_off.src = "about.gif";
a12_on.src = "sitemapo.gif";
a12_off.src = "sitemap.gif";
//}
}

function rollon( img ) { //swap in highlighted images
imga = eval(img + "_on.src");
if ( (document.images) && (imga)) {
document.images[img].src = eval( img + "_on.src" );
}
}

function rolloff( img ) { //swap in unhighlighted images
imgb = eval(img + "_off.src");
if ( (document.images) && (imgb)) {
document.images[img].src = eval( img + "_off.src" );
}
}