var _POPUP_FEATURES = 'location=0, statusbar=0, menubar=0, width=400, height=300, resizable=1';

function raw_popup(url, target, features) {
  if (isUndefined(features)) {
    features = _POPUP_FEATURES;
  }
  if (isUndefined(target)) {
    target = '_blank';
  }
  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);
}

function mc_popup(src) {
  features =  'width=700, height=600, location=1, toolbar=1, status=1, menubar=1, resizable=1, scrollbars=1';
  return raw_popup(src.getAttribute('href'), src.getAttribute('target') || '_blank', features);
}