php组合highcharts和Ajax获取数据失败

php结合highcharts和Ajax获取数据失败

效果图如上，但是我只完成了下面那个表格那块，上面的走势图弄不出来，我是分别Ajax来获取了（走势图和表格分开的）；本来是想用一个文件来完成，但是失败了

下面放上文件：
主文件

<?php

require ('inc/config.php');

$page_title = '各区域住宅成交情况-feige数据中心';

include ('inc/header.php');

require (MYSQL);

?>

<div class="portlet wrap mT50">

	<div class="portlet-title">各区域住宅成交情况</div>

	<div class="portlet-body">

	<form action="zhuzhai.php" method="post">

    	<div class="datePickerBlock">

        区域

			<select id="city" name="city" class="select-city">

				<?php 

				$q = "SELECT city_id, city_name FROM f_city ORDER BY city_id ASC";		

				$r = mysqli_query ($conn, $q) or trigger_error("Query: $q\n<br />MySQL Error: " . mysqli_error($conn));

				if (@mysqli_num_rows($r) > 0) {

					while ($row = mysqli_fetch_array ($r, MYSQLI_NUM)) {

						echo "<option value=\"$row[0]\">$row[1]</option>\n";

					}

					mysqli_free_result ($r);

				} else {

					echo '<option>暂无区域，请添加一个新地区</option>';

				}

				mysqli_close($conn);

				?>

			</select>     

        自定义时间范围

        <input id="start_time" name="start_time" class="hasDatePicker" onClick="WdatePicker()" type="text" size="16" value="" />至<input id="end_time" name="end_time" class="hasDatePicker" onClick="WdatePicker()" type="text" size="16" value="" />

        <input class="btn" type="submit" id="submit" value="查询" />

        </div>

	</form>	




	<div id="container" style="min-width:800px;height:400px;margin:10px 0;"></div>

        <table id="datatable" class="tableStyle">

        <thead>

            <tr>

                <th></th>

                <th>成交面积</th>

                <th>成交套数（套）</th>                

            </tr>

         </thead>

         <tbody>

            <tr>

                <td>2014-08-15</td>

                <td>222</td>

                <td>16670</td>

            </tr>

            <tr>

                <td>2014-08-16</td>

                <td>7167.07</td>

                <td>621</td>               

            </tr>

            <tr>

                <td>2014-08-17</td>

                <td>71660.07</td>

                <td>62</td>              

            </tr>

            <tr>

                <td>2014-08-18</td>

                <td>21</td>

                <td>716</td>

            </tr>

        </tbody>

        </table>