用bootstrap做下拉選單，並使用jQuery實現從伺服器非同步載入下拉選單的item。

前臺程式碼：

<div class="form-group">
                <label class="col-md-2 control-label" for="phone_num">裝置分中心</label>
                <div class="col-md-8">
                    <input class="form-control" name="phone_num1" type="text" id="phone_num" placeholder="" value="" required />
                </div>
                <div class="dropdown">
                    <button class="btn btn-default dropdown-toggle" type="button" id="unitid" data-toggle="dropdown" aria-haspopup="true" aria-expanded="true">
                        選擇<span class="caret"></span>
                    </button>
                    <ul class="dropdown-menu" aria-labelledby="unitid" id="unitItem">  
                    </ul>          
                </div>
            </div>
 

$("#unitid").bind("click", function () {            
                $.ajax({
                    url: "/control/showunit/",
                    dataType: "json",
                    success: function (data) {
                        $.each(data, function (index, units) {
                            $("#unitItem").append("<li><a href='#'>" + units.unit + "</a></li>");
                        });
                    },
                   
                    error: function (XMLHttpRequest, textStatus, errorThrown) {
                        alert("error");
                    }
                });
            });
 

<pre name="code" class="python">def showunit (request):
    '''顯示所有公司的檢視'''
    start=request.POST.get('start','')
    logging.info(start)
    logging.info('hsa')
    s_list = []
    allunit= Unit.objects.all()
    for item in allunit:
        comptuple = {}
        comptuple['id'] = item.unitidx1
        comptuple['unit'] = item.name1
        s_list.append(comptuple)
    s_list=set_dict(s_list)
    total_count = len(s_list)
    root_name = 'units'
    #data = '{"total":%s,%s:%s}' %(total_count,root_name,simplejson.dumps(s_list))<span style="color:#33cc00;">#這種格式不是嚴格的json格式，返回時執行error函式；</span>
    data = '%s' %(simplejson.dumps(s_list))
    return HttpResponse(data,mimetype='text/javascript;')