BootStrap模态框闪退问题实例代码详解

<!--搜索注册条-->
 <div class="container-fluid">
  <form class="navbar-form navbar-center" role="search">
    <div class="form-group text-center col-sm-4">
      <input type="text" class="form-control" placeholder="search">
      <span class="input-group-addon">搜索</span>
    </div>
    <div class="container">
       <button type="submit" class="btn-info">登录</button>
       <button type="button" class="btn-danger">注销</button>
       <button class="btn btn-primary btn-lg" data-toggle="modal" data-target="#mymodal" >注册</button>
      <!--注册的模态框-->
       <div class="modal fade" id="mymodal">
        <div class="modal-dialog">
          <div class="modal-content">
            <div class="modal-header">
             <button type="button" class="close" data-dismiss="modal">×</button>
             <h4 class="modal-title">注册</h4>
            </div>
            <div class="modal-body">
             <div class="container">
               <div class="input-group">
                <label>手机号</label>
                <input type="text" class="form-control" placeholder="请输入您的手机号" />
               </div>
               <div class="input-group">
                <label>姓名</label>
                <input type="text" class="form-control" placeholder="请输入您的姓名" />
               </div>
               <div class="input-group">
                <label>邮箱</label>
                <input class="text" class="form-control" placeholder="请输入您的邮箱" />
                <span class="input-group-addon">@qq.com</span>
               </div>
               <div class="input-group">
                <label>性别</label>
                <label class="radio-inline"><input class="radio" />男     </label>
                <label class="radio-inline"><input class="radio" />女     </label>
               </div>
               <div class="input-group">
                <div class="progress">
                <div class="progress-bar" style="width: 50px;">
               <span class="sr-only">注册信息提交中......</span>
              </div>
            </div>
           </div><!--body部分-->
        <div class="modal-footer">
         <button class="btn btn-primary">提交</button>
         <button class="btn btn-default" data-dismiss="modal">关闭</button>
        </div>
         </div>
        </div>
      </div>
      <!--注册的模态框-->
      </div>
   </form>
  <!--搜索注册条-->
 </div>