hi,
this may help...-
see my sample at -> jschmidt-systemberatung.de/index.php?opt...5&Itemid=659&lang=en
 also have look at the sample event script: jschmidt-systemberatung.de/plugins/conte...aph/js/test_event.js

There's a mistake. Could it be the order to publish the plugin? I changed the order but it has no effect.

{rgraph chart_name="chart" type="Bar" title="Update Chart with a click" width="600" height="300"
data="5000,5000,5000,5000,6000,7000,8000,8000,11000,9000" colorsSequential="true"
variant="3d" gutterBottom="105" gutterLeft="85" event_script="plugins/content/rgraph/js/tan-event-js/event-script-1.js" }csv{/rgraph}


php-rgraph.common.js:388 Uncaught TypeError: Cannot read property 'width' of null
at Object.RG.reset.RG.Reset (php-rgraph.common.js:388)
at home:262
RG.reset.RG.Reset @ php-rgraph.common.js:388
(anonymous) @ home:262
postMessage (async)
onclick @ home:1313

seems that your plugin parms have been corrupted. Did you copy/paste my sample? Ensure that you paste with option "paste as plain text" otherwise imbedded html-codes may invalidate your input.
  Also  check with setting parm debug="1" and have a look at your html-page's source