var _POPUP_FEATURES = 'location=0,statusbar=0,menubar=0,width=250,height=320';
function isUndefined(a) { return typeof a == 'undefined' }

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 cpopup(url,target,w,h) {
  var wleft = (screen.width-w) / 2;
  var wtop = (screen.height-h) / 2 - 150;

  var theWindow = window.open(url, target, 'resizable=1,scrollbars=1,location=0,statusbar=0,menubar=0,width=' + w + ',height=' + h + ',top=' + wtop + ',left=' + wleft);
  theWindow.focus();
  return theWindow;
}


//
//