function popupfo1(a,l) {
url1='';
var ancho1 = a; 
var largo1 = l;
var screenX1 = (screen.width/2 - ancho1/2);
var screenY1 = (screen.height/2 - largo1/2);
var cosas1= "width=" + ancho1 + ",height=" + largo1;
cosas1 += ",screenX=" + screenX1 + ",left=" + screenX1;
cosas1 += ",screenY=" + screenY1  +",top=" +screenY1;
cosas1 += ",scrollbars=0,resizable=no,toolbar=no,location=no,directories=no,status=no,menubar=no'";
var mywin1=window.open(url1, "ventana1", cosas1);
mywin1.focus();
}
function popupform() {
url='';
var ancho = 900; 
var largo = 500;
var screenX = (screen.width/2 - ancho/2);
var screenY = (screen.height/2 - largo/2);
var cosas= "width=" + ancho + ",height=" + largo;
cosas += ",screenX=" + screenX + ",left=" + screenX;
cosas += ",screenY=" + screenY  +",top=" +screenY;
cosas += ",scrollbars=1,resizable=no,toolbar=yes,location=no,directories=no,status=no,menubar=yes'";
var mywin=window.open(url, "ventana", cosas);
mywin.focus();
}