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                         In
                          the applet form of the graph, any data item can be linked
                          to a JavaScript function within the current page via
                          the URL and target elements.  
                        To
                          instruct the graph applet to execute a JavaScript function
                          ( rather than URL ) upon a mouse click the target element
                          of the data item must be set to a value of "javascript".
                           
                        The
                          function to be executed should then be entered in the
                          URL element of the data item. 
                        In
                          addition it is vital that "mayscript"
                          is present in the applet tag e.g, 
                          <applet
                            code="HbarchartApplet.class" archive="Hbargraph.jar"
                            width="500" height="420" mayscript> 
                        For
                          an example of the graph applet executing a JavaScript
                          function please click
                          here. 
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