how to reload/refresh a div with the same  content on button click,

I used location.reload(), but it refreshes the entire div..,

I want to only refresh/reload the div...

I also tried using     $('#refresh').html( 'content for the div' );,

but it replaces the original content of the with 'content for the div',

I want the original content of the div to be refreshed and not replaced.

looking forward for a reply...