When I implement LineChart is ExtJS it try to pull http://yui.yahooapis.com/2.8.2/build/charts/assets/charts.swf and my firewall does not allow it (no external connection allowed) – how I can deal with it ?
Can I have SWF file stored locally and what I should change to force reading from local ?
Yes.
See this example
Specifically –
(modify the relative path based on your setup)