var _POPUP_FEATURES = 'location=0, statusbar=0, menubar=0, scrollbars=1, width=700, height=650';

function raw_popup(url, target, features) {
  
  features = _POPUP_FEATURES;
  var theWindow = window.open(url, target, features);
  theWindow.focus();
  return theWindow;
}

function link_popup(src, features) {
  return raw_popup(src.getAttribute('href'), src.getAttribute('target') || '_blank', features);
}