<Script Language="Javascript">
<!-- Comienzo
netscape = (navigator.appName == "Netscape");
n4 = netscape && (parseInt(navigator.appVersion) >= 4);
explorer = (navigator.appName == "Microsoft Internet Explorer");
ie4 = explorer && (parseInt(navigator.appVersion) >= 4);

function temblar(n) {
    if (n4 || ie4) {
        for (i = 12; i > 0; i--) {
            for (j = n; j > 0; j--) {
                self.moveBy(0,i);
                self.moveBy(i,0);
                self.moveBy(0,-i);
                self.moveBy(-i,0);
            }
        }
    }
}
// Fin -->
</script>