var newwindow;
function abreventana(ven){
newwindow=window.open(ven,"nuevaventana","width=500,height=500,left=190,top =50,toolbar=no,directories=no,menubar=no,status=no");  
  if (window.focus) {newwindow.focus()}
  return false;
}

var newlibro;
function abrelibro(venlibro){
newlibro=window.open(venlibro,"nuevolibro","width=400,height=500,left=190,top =50,toolbar=no,directories=no,menubar=no,status=no");  
  if (window.focus) {newlibro.focus()}
  return false;
}



var GB_ROOT_DIR = "greybox/";