[jQuery] How to pass in data

What is the best way to get data into jQuery? Obviously, jQuery
separates data and presentation.  How can I pass in a parameter?
Below, you can see how I called a method with a  hardcoded value, but
I want to dynamically pass in a value from web page.

$(document).ready(function()
{

 /* tweet status id number */
 getTwitter('7833519704');

});

What is the recommended strategy when using jQuery? Should I use a
different event? It may mean that I should employ a hybrid method or
technique.

Any ideas or recommendations are appreciated.

Thanks.  Pat