var windowReference;
function NewBrowserWindow()
{
  type="n2";
  browser = navigator.appName;
  version = parseInt(navigator.appVersion);
  position=navigator.appVersion.indexOf("MSIE");
  IEVersion=navigator.appVersion.slice(position+5,position+6);
  if( browser == "Netscape" && version >= 3 )
    type = "n3";
  else if( browser == "Netscape" && version == 2 )
    type = "n2";
  else if( browser == "Microsoft Internet Explorer" && version >= 2 && IEVersion < 5 )
    type = "e3";
  else if( browser == "Microsoft Internet Explorer" && IEVersion >= 5 )
    type = "e5";
  
  if( windowReference )
  {
    if( type == "e3" || type=="n2" )
    {
      if( !windowReference.closed )
      {  
        windowReference.close();
      }
    }
  }
  windowReference = window.open( "", 
                                 "NewBrowserWindow", 
                                 "width=640, height=400, resizable=yes, toolbar=yes, menubar=yes, location=yes, status=yes, scrollbars=yes" );
  if( type == "n3" || type == "e5" )
    windowReference.focus();
}
function changeframe( url )
{ 
  parent.sidebar.location.href = url;
};