I need a ajax submission system without page refresh, I found one from the [submit-a-form-without-page-refresh-using-jquery script site](http://net.tutsplus.com/tutorials/javascript-ajax/submit-a-form-without-page-refresh-using-jquery/)

After remove `jquery-ajax\images\form_bg.png`, How to empty the search box after submit the data? Can anyone add a small code for me? Thanks.