function abrir(theURL){ 
alto=550;
ancho=1000;
vs="no";
if(screen.availHeight>700)
{ alto=550;
  ancho=1000; 
  vs="no"; }
PosX = (screen.availWidth - ancho)/2;
PosY = (screen.availHeight - alto)/2;
poppup = 'width='+ancho+',height='+alto+',toolbar=no,location=no,directories=no,menubar=no,scrollbars='+vs+',resizable=no,top='+PosY+',left='+PosX;
window.open(theURL,'',poppup) ;
 }

function abrir1(theURL){ 
alto=899;
ancho=1157;
vs="no";
if(screen.availHeight>700)
{ alto=899;
  ancho=1157; 
  vs="no"; }
PosX = (screen.availWidth - ancho)/2;
PosY = (screen.availHeight - alto)/2;
poppup = 'width='+ancho+',height='+alto+',toolbar=no,location=no,directories=no,menubar=no,scrollbars='+vs+',resizable=no,top='+PosY+',left='+PosX;
window.open(theURL,'',poppup) ;
 }