Avoid browser autocomplete form feature when clicking on buttons

I have a simple form that contains a lot of duplicate textboxes. I have a button called "Copy" that simply copies values from certain textboxes to another.

HTML:

<button id="copycorporate">Copy</button>

jQuery:

$('#copycorporate').button();

$('#copycorporate').click(function(e) {
    e.preventDefault();
    $('#txt_streetadd').val( $('#txt_cor开发者_Python百科p_address').val() );
    $('#txt_suitefloor').val( $('#txt_corp_suite').val() );

})

Now depending on the browser, in this case Firefox 6.0, it prompts the user if they would like to save the form information (usually this happens after a submission). How do I avoid triggering the autocomplete feature when by users simply click on a non-submit utility button?

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autocomplete="off" 

in your input, probably

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what about adding the attribute like this?

$('#txt_streetadd').val( $('#txt_corp_address').val() ).attr("autocomplete","off");