在整个站点上启用SearchBox ENTER

Question

我在我的网站上有一个html和jquery的searchBox，问题是当我按下ENTER时我的网站上的任何地方我被发送到searchBox搜索结果页面，无论我是否正在键入/选择它

HTML SearchBox代码：

class PersonsModel extends Model {
    //connect to the next database
    protected $connection = 'inspection';
    protected $table = 'tbl_trucks';

    //relation with tbl_checks

    public function checks(){
        return $this->hasMany('App\TblChecks','person_id','id');
    }
}

jQuery代码：

                        <li>
                        <div class="formBusca">
                            <form role="search" method="post" class="search-form" action="">
                                <div class="input-busca">
                                    <input type="search" class="search-field" id="palavra-chave" placeholder="Busca..." name="palavra-chave" title="Pesquisar">
                                </div>
                                <div class="botao-busca">
                                    <input type="button" class="search-submit" id="busca-site" value="">
                                </div>
                            </form>
                        </div>
                    </li>