score:1

By export I assume you mean save to the client computer. Generally, there is not universal cross browser way to do this from the client-side only. Generally there must be http traffic from the server with a content type of text/csv etc do trigger the browser to do a download. For security reasons it is not really possible to trigger a download of javascript generated content. HOWEVER, you can do this, here is a great existing discussion about this.

Create a file in memory for user to download, not through server

score:1

You can export to the CSV, which is one of excel format.

http://www.highcharts.com/plugin-registry/single/7/Export-CSV


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