Get a Facebook Application ID in JavaScript

I needed to get my facebook application’s ID in my Javascript code.  I didn’t see a public API way of doing this or other posts online, so here’s a little hack to get at it:

function getApplicationId() {
try {
some_nonexistent_function();
} catch(e) {
var match = e.message.match(/^a(\d+)_/);
return match[1];
}
}

It takes advantage of the fact that the exception message contains the ID.  Nothing fancy, but I liked it :)

Please let me know if there’s a better way!

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