同步更新input中的内容

HTML：
<div class="form-group">
                        <label class="control-label" for="srAddress">SR地址</label>
                        <input type="text" name="srinterfaceip" class="form-control" id="srAddress" placeholder="请输入接口地址"/>
                    </div>
                     <div class="form-group">
                        <label class="control-label" for="interfaceAddress">逻辑地址</label>
                        <input type="text" name="srloopbackip" class="form-control" id="logicalAddress" placeholder="请输入接口地址" />
                    </div>

js:
//添加BR的时将BR地址同时更新逻辑地址
      $("#srAddress").bind("keyup",function(){
      $("#logicalAddress").val(this.value);
      });