function CenteredPopup(windowWidth, windowHeight, windowName, url, showmenu) 
{
    CenteredPopup(windowWidth, windowHeight, windowName, url, false) 
}

function CenteredPopup(windowWidth, windowHeight, windowName, url, showmenu) 
{
 var width  = windowWidth;
 var height = windowHeight;
 var left   = (screen.width  - width)/2;
 var top    = (screen.height - height)/2;
 var params = 'width='+width+', height='+height;
 params += ', top=' + top + ', left=' + left;
 params += ', directories=no';
 params += ', location=no';
 
 if (showmenu)
 {
    params += ', menubar=yes';
    params += ', toolbar=yes';
 }
 else
 {
    params += ', menubar=no';
    params += ', toolbar=no';
 }
 
 params += ', resizable=yes';
 params += ', scrollbars=yes';
 params += ', scrollbars=yes';
 params += ', status=yes';

 newwin=window.open(url,windowName, params);
 if (window.focus) {newwin.focus()}
 return false;
}

function bookmark(url,title)
{
  if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4)) {
  window.external.AddFavorite(url,title);
  } else if (navigator.appName == "Netscape") {
    window.sidebar.addPanel(title,url,"");
  } else {
    alert("Press CTRL-D (Netscape) or CTRL-T (Opera) to bookmark");
  }
}