function pop(u,n,f, w, h, c) {
  if(window.screen)if(c)if(c=="1"){
    var l = (screen.width-w)/2;
    var t = (screen.height-h)/2;
    f+=(f!='')?',':'';
    f+='left='+l+',top='+t;
  }
  flop=window.open(u,n,f+((f!='')?',':'')+'width='+w+',height='+h);
  flop.focus();
}

function suscripcion () {
window.open('suscrip.htm','Suscripcion','width=800,height=600,left=200,top=200');
}