Jquery function bug - wordpress search button doesnt work

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jQuery

WordPress

Hi everyone!

I'm not a coder and I'm just trying to learn some basics. I have a wordpress site with a search form but the button to click and get result, is not working.

I had some problems with other plugins, so I'm using jquery 1.6.0 thats every other things works fine. www.briquesi.com.br/fatornobre

Here is the code of the button.. Is this information enought to help me?

jQuery('#header_search_button').click(function(){
                            if ((jQuery('#s').val() !='') && (jQuery('#s').val() != 'buscar')){                             
                                jQuery(this).parents('form').trigger('submit');
                            }
                        }

Thanks for your attention!