function popup() {
window.open('login-form.html','','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,width=650,height=500,left=0,top=0');
}

function login(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}