function RenderPopup(windowsource, windowname, width,
                            height, scrollbars, directories, location,
                            menubar, status, toolbar, resizable)
                        {
   var windowfeatures = 'width=' + width + ',height=' + height + ',directories=' + directories + ',location=' + location + ',menubar=' + menubar + ',scrollbars=' + scrollbars + ',status=' + status + ',toolbar=' + toolbar + ',resizable=' + resizable; 
  w=window.open(windowsource, windowname, windowfeatures);
  w.focus();
}