学习布局中

 <div class="row-fluid">
  <div class="span12 text-center">1</div>

</div>

<div class="container" style="margin-top:150px"> 
    <div class="row"> 
        <div class="span4 offset4 well"> 
            <legend>请登录</legend> 
            <div class="alert alert-error" style="display:none"> 
                <a class="close" data-dismiss="alert" href="#">×</a>错误的用户名或密码 
            </div> 
            <form method="POST" action="" accept-charset="UTF-8"> 
            <input type="text" >
            <p class="help-block">注意用户名的大小写</p> 
            <input type="password" >
            <p class="help-block">注意密码的大小写</p> 
            <label class="checkbox"> 
                <input type="checkbox" name="remember" value="1"> 记住密码 
            </label> 
            <button type="submit" name="submit" class="btn btn-info btn-block">登录</button> 
            </form>     
        </div> 
    </div> 
</div>