如何在jQuery onChange（）事件中提交表单 - 涉及Bootstrap

I have this markup:

我有这个标记:

<form id="dpl" class="form-horizontal" method="post">
    <label class="col-md-1 control-label" for="report_date">Svc Date</label>
    <div class="col-md-3" id="dispatchLog-container">
        <div class="input-group date">
            <input id="dpl_date" name="start" type="text" class="form-control" required="" value="11/17/2015" tabindex="-1"><span class="input-group-addon"><i class="glyphicon glyphicon-calendar"></i></span>

        </div>
    </div>
</form>
<form id="dpl"