A copy of the JavaScript functions in the head element:

// sample-4-write.js
// This sample shows writing a window

// global variable for the new window object
var winObj;

// open a new window with cleo.html
function newWindow(my_button_number)
  {
  var my_begin = "";
  var my_text  = "The button you pressed is: ";
  var my_end   = "";
  var my_features = "height=394,width=288,top=394,left=288,resizable=yes";
  // if the window does not exist, or is closed, open it
  if( typeof(winObj) == "undefined"  ||  winObj.closed )
    {
    // empty string for the page name means we get an empty window.  We will write the html.
    winObj = open("", "writePage", my_features);
    }
  // if the window exists and is open, write to it
  if( typeof(winObj) != "undefined"  && ! winObj.closed )
    {
    // document open will erase the previous contents of the window
    winObj.document.open();
    winObj.document.writeln(my_begin);
    winObj.document.writeln(my_text);
    winObj.document.writeln(my_button_number);
    winObj.document.writeln(my_end);
    // document close must be used after document open and the write statments
    winObj.document.close();
    // if we are writing into an existing window, we must be sure it has focus
    winObj.focus();
    }
  }

// close the new window
function closeWindow()
  {
  // if the window exists and is open, close it
  if( typeof(winObj) != "undefined"  && ! winObj.closed )
    {
    winObj.close();
    }
  }