搜索和加载结果jquery ajax

我对AJAX/jQuery还很陌生，我只是在探索一些东西这是我的问题，我有一个文本框，我想做的是，如果我单击搜索按钮，搜索结果将加载（#sort results）。我不知道这有什么问题。。我希望任何人都能让我更加理解。谢谢

Index.php

<input type="text" name="item_type" class="item_type"></td>
        <select class="location">
          <option value="bldg1">bldg1</option>
          <option value="bldg2">bldg2</option>
        </select>
        <button class="btn_search">Search</button>
      <div id="sort-results"></div>

Script.js

$(".btn_search").click(function(){
  type = $(".item_type").val();
  location = $(".location").val();
    if(type.length > 0){
    $.ajax({
      type: "GET",
      url: "sort.php",
      data: "type="+type +"location="+location,
      cache:false,
      success : function(){
        $("#sort-results").html();
      }
    });
   }

})；

Sort.php

require 'global/db.php';
require_once 'config.php';
$type = $_GET['type'];
$location = $_GET['location'];
$db = new Database(DBHOST, DBUSER, DBPASS, DB);
$selection = $db->select("SELECT * FROM os_inventory WHERE os_type like '$type' AND os_location like '$location'");
echo "<table class=bordered>
        <tr><th>Item</th>
        <th>Item Code</th>
        <th>Item Type</th>
        <th>Serial No.</th>
        <th>Date Added</th>
        </tr>";
foreach ($selection as $key) {
    echo "<tr>";
    echo "<td>" . $key['os_id'] . "</td>";
    echo "<td>" . $key['os_type'] . "</td>";
    echo "<td>" . $key['os_code'] . "</td>";
    echo "<td>" . $key['os_serial'] . "</td>";
    echo "<td>" . $key['os_date'] . "</td>";
    echo "</tr>";
}
echo "</table>";