var bbtopon, bbtopoff, bbc41on, bbc41off, bbahcon, bbahcoff, bbawhon, bbawhoff, bbisaacon, bbisaacoff, bbuleicon, bbuleicoff, bbaaon, bbaaoff, bbcron, bbcroff, bbcricon, bbcricoff;

function bbPreLoad() {

bbtopon = new Image(40, 40);
bbtopon.src = "../img/bb/top40B.gif";

bbtopoff = new Image(40, 40);
bbtopoff.src = "../img/bb/top40.gif";

bbc41on = new Image(40, 40);
bbc41on.src = "../img/bb/herst40B.jpg";

bbc41off = new Image(40, 40);
bbc41off.src = "../img/bb/herst40.jpg";

bbawhon = new Image(40, 40);
bbawhon.src = "../img/bb/UlughBeg40B.jpg";

bbawhoff = new Image(40, 40);
bbawhoff.src = "../img/bb/UlughBeg40.jpg";

bbahcon = new Image(40, 40);
bbahcon.src = "../img/bb/SHmws2-40B.jpg";

bbahcoff = new Image(40, 40);
bbahcoff.src = "../img/bb/SHmws2-40.jpg";

bbisaacon = new Image(40, 24);
bbisaacon.src = "../img/bb/isaaclogo6notext40B.jpg";

bbisaacoff = new Image(40, 24);
bbisaacoff.src = "../img/bb/isaaclogo6notext40.jpg";

bbuleicon = new Image(40, 80);
bbuleicon.src = "../img/bb/ULlogo31B.gif";

bbuleicoff = new Image(40, 80);
bbuleicoff.src = "../img/bb/ULlogo31.gif";

bbaaon = new Image(40, 40);
bbaaon.src = "../img/bb/caracol40B.jpg";

bbaaoff = new Image(40, 40);
bbaaoff.src = "../img/bb/caracol40.jpg";

bbcron = new Image(40, 40);
bbcron.src = "../img/bb/cr1yuri40B.jpg";

bbcroff = new Image(40, 40);
bbcroff.src = "../img/bb/cr1yuri40.jpg";

bbcricon = new Image(40, 40);
bbcricon.src = "../img/bb/anakena40B.jpg";

bbcricoff = new Image(40, 40);
bbcricoff.src = "../img/bb/anakena40.jpg";

}

function MouseOn(n) {

imageON = eval(n + "on.src");
document.images[n].src = imageON;

}

function MouseOff(n) {

imageOFF = eval(n + "off.src");
document.images[n].src = imageOFF;

}