var _POPUP_FEATURES = 'location=0,statusbar=1,resizable=1,scrollbars=1,menubar=0,width=600,height=500';

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

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