anchor.diff:                        <button id="btn_geo" class="btn btn-primary btn-choose" style="float:left;" type="button">地址定位
                     </div>
                     </div>
  -
  +                  <%= f.hidden_field :location%>
                     <div class="form-actions">
                       <%= submit_tag '保存',:class => "btn btn-primary btn-small" %>
                       or <a class="text-danger" href="/sites">取消</a>
  
positive.code: <script type="text/javascript">
  $(document).ready(function(){
      var map = new BMap.Map("allmap"); 
      point = new BMap.Point(116.404, 39.915)
      if($('#site_location').val() != null){
        pos = $('#site_location').val().split(',');
        point = new BMap.Point(pos[1],pos[0]);
        var marker = new BMap.Marker(point); 
  
negative.code:                   <div class="form-group">
                      <label class="control-label">地址</label>
                      <div class="controls">
                        <%= f.text_field :address , :class => "form-control input-small"%>
                    </div>
                    </div>
                    <div class="form-group">
  