I'm moving back from ExtJS to jQuery, so it was refresher time.  For instant fun, try this online example...

Tutorials:Getting Started with jQuery - jQuery Wiki:
If you don't have a web server with PHP installed at hand, you can look at an online example.

... and knock yourself out with this line:
$("a")[0].innerHTML = "9360054"

(changing the number to whatever you want, of course.)

???

Profit.

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