You can use following FusionCharts JsFiddle as starting point:
html:
<div id="divid">FusionCharts will render here</div>
javascript:
FusionCharts.ready(function () {
FusionCharts.setCurrentRenderer('javascript');
var a = new FusionCharts({type: "bar2d", id: "contracts_57234775759d1", renderAt: 'divid', width: "800", height: "600"});
//Provide entire XML data using dataXML method
a.setDataXML("<chart caption='Lorem ipsum' subcaption='' numberPrefix='€ ' clicked_level_id='' clicked_chart_report_id='69'><set label='Main category' value='644053250' link='newchart-xml-5652'/><linkeddata id='5652'><chart caption='Amounts' subcaption='Main category' numberPrefix='€ ' clicked_level_id='5652' clicked_chart_report_id='69' grid_class='cdgrid' filters='{"department_id":5652,"history_date":null}'><set label='Sub1' value='15000000'/><set label='Sub2' value='0'/><set label='Demo' value='566065750' link='newchart-xml-19249'/><set label='Sub3' value='0'/><set label='Sub4' value='0'/><set label='Sub5' value='40514250' link='newchart-xml-5656'/><set label='Sub6' value='15000000'/><set label='Sub7' value='0'/><set label='Sub8' value='0'/><set label='Sub9' value='0'/><set label='test' value='0'/><set label='testDep' value='0'/><set label='Sub10' value='0'/><linkeddata id='19249'><chart caption='Lorem ipsum' subcaption='Main category->Demo' numberPrefix='€ ' clicked_level_id='19249' clicked_chart_report_id='69' grid_class='cdgrid' filters='{"department_id":19249,"history_date":null}'><set label='110' value='0'/><set label='30' value='0'/><set label='5' value='0'/><set label='56' value='0'/><set label='A1' value='0'/><set label='A2' value='0'/><set label='A3' value='0'/><set label='A4' value='0'/><set label='A5' value='0'/><set label='A6' value='0'/><set label='A7' value='550000000'/><set label='A8' value='550006500'/><set label='A9' value='550000000'/><set label='A10' value='550006500'/><set label='A11' value='550014250'/><set label='A12' value='550000000'/><set label='A13' value='0'/><set label='A14' value='0'/><set label='A15' value='0'/><set label='A16' value='0'/><set label='A17' value='16000000'/></chart></linkeddata><linkeddata id='5656'><chart caption='Amounts' subcaption='Directie->a' numberPrefix='€ ' clicked_level_id='5656' clicked_chart_report_id='69' grid_class='cdgrid' filters='{"department_id":5656,"history_date":null}'><set label='Grondexploitatie' value='0'/><set label='Proj' value='23014250' link='newchart-xml-5660'/><linkeddata id='5660'><chart caption='Amounts' subcaption='Directie->A->Projectontwikkeling' numberPrefix='€ ' clicked_level_id='5660' clicked_chart_report_id='69' grid_class='cdgrid' filters='{"department_id":5660,"history_date":null}'><set label='Label1' value='0'/><set label='Label2' value='23014250'/></chart></linkeddata></chart></linkeddata></chart></linkeddata></chart>");
a.render("divid");
});
You run this it will work just fine. It will render the chart, click on the bar, you see the other bars, all is ok.
Now add external Prototype as external source: http://prototypejs.org/assets/2009/8/31/prototype.js
Run it, the chart is generated find but when clicking on the bar you see "No data to display" although nothing changed. There is no error either.