Jquery饼图问题

Question

“我使用了简单的jquery饼图代码。在刷新显示饼图的页面后，这个饼图没有显示第一个请求。”下面是我的代码。

    <?php 
    $total_advanced = 0;
    $total_proficient = 0;
    $total_basic = 0;
    $total_belowbasic = 0;
    $total_farbelow = 0;
    $total_noscore = 0;
    ?>
    <div id="proficiency_pie<?php echo $widget->id;?>" style="width: auto; min-width: 150px; height: 150px;"></div>
    <script>
    var data = <?php echo json_encode(array(
        array( 'label'=>"Advanced",  'data'=>$total_advanced, 'color'=>'#007F5B'),
        array( 'label'=>"Proficient",  'data'=>$total_proficient, 'color'=>'#00CB95'),
        array( 'label'=>"Basic",  'data'=>$total_basic, 'color'=>'#FFB800'),
        array( 'label'=>"Below Basic",  'data'=>$total_belowbasic, 'color'=>'#F9CF60'),
        array( 'label'=>"Far Below",  'data'=>$total_farbelow, 'color'=>'#F17F71'),
        array( 'label'=>"No Score",  'data'=>$total_noscore, 'color'=>'#EEEEEE'),
    )); ?>;
    $(function(){
        try {
            $.plot($("#proficiency_pie<?php echo $widget->id;?>"), data,
            {
                series: {
                    pie: {
                        show: true
                    }
                }
            });
        } catch ($e) {}
    });
    </script>