下拉列表搜索opencart

Question

我正在尝试更改opencart标题中的搜索字段，以便在输入提交按钮后查找特定值。 这不是真的有效，但我无法弄清楚为什么。我错了什么？

这是我的代码： header.tpl

<div id="search">
<div class="button-search"></div>
<div><?php echo $text_search; ?></div>
<select name="filter_name" id="filter_name">
<option value="–">–</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</option>
<option value="9">9</option>
<option value="10">10</option>
</select>
<select name="filter_name" id="filter_name">
    <option value="–">–</option>
    <option value="pink">pink</option>
    <option value="blue">blue</option>
    <option value="red">red</option>
    <option value="yellow">yellow</option>
    <option value="green">green</option>
    </select>
</div>

的header.php

if (isset($this->request->get['filter_name'])) {
        $this->data['filter_name'] = $this->request->get['filter_name'];
    } else {
        $this->data['filter_name'] = '';

和common.js

$(document).ready(function() {
    /* Search */
    $('.button-search').bind('click', function() {
    url = $('base').attr('href') + 'index.php?route=product/search';

    var filter_name = $('input[name=\'filter_name\']').attr('value');

    if (filter_name) {
        url += '&filter_name=' + encodeURIComponent(filter_name);
    }

    var filter_name = $('#content select[name=\'filter_name\']').attr('value');

    if (filter_name!='-') {
        url += '&filter_name=' + encodeURIComponent(filter_name);
}

    location = url;
});

$('#header input[name=\'filter_name\']').bind('keydown', function(e) {
    if (e.keyCode == 13) {
        url = $('base').attr('href') + 'index.php?route=product/search';

        var filter_name = $('input[name=\'filter_name\']').attr('value');

        if (filter_name) {
            url += '&filter_name=' + encodeURIComponent(filter_name);
        }

        var filter_name = $('#content select[name=\'filter_name\']').attr('value');

        if (filter_name!='-') {
            url += '&filter_name=' + encodeURIComponent(filter_name);
        }   

        location = url;
    }
});