function posadata(){
data = new Date();
Mes = data.getMonth();
mesos = new Array ("01","02","03","04","05","06","07","08","09","10","11","12");
Dia = data.getDay();
var any = data.getYear();
if (any < 2000) 
any = any + 1900;
document.write( data.getDate() + "-" + mesos[Mes] + "-" + any);
}