 
<!-- Begin
// ---------------------- Rotacion de Banners ---------------
var how_many_ads = 3;
var now = new Date()
var sec = now.getSeconds()
var ad = sec % how_many_ads;
ad +=1;
if (ad==1) {
url="http://www.americanexpress.com.mx";
alt="American Express";
banner="images/boton-amex.gif";
width="120";
height="60";

}
if (ad==2) {
url="http://www.bacardi.com.mx";
alt="Bacardi";
banner="images/boton-bacardi.gif";
width="120";
height="60";
}
if (ad==3) {
url="http://www.cocacola.com.mx";
alt="Coca cola";
banner="images/boton-coca.gif";
width="120";
height="60";
}



if (url != '') {
		document.write('<a href=\"' + url + '\" target=\"new\">'); 
		}
		document.write('<img src=\"' + banner + '\" width=')
		document.write(width + ' height=' + height + ' ');
		document.write('alt=\"' + alt + '\" border=0><br>');
		
// End -->
