app/views/shared/_header.html.erb
<header>
<nav>
<h1><a href="/">新的课堂</a></h1>
<ul>
<% unless online? %>
<li>
<a href="<%= new_publisher_path() %>">注册</a>
</li>
<li>
<a href="<%= login_path() %>">登录</a>
</li>
<% else %>
<li>
<a href="<%= new_lessonplan_path() %>">创建新教案</a>
</li>
<li>
<a href="<%= publisher_path current_user %>">我的信息</a>
</li>
<li>
<a href="<%= logout_path() %>">退出</a>
</li>
<% end %>
<li>
<a class="icon-email feedback" href="mailto:newclass.org@gmail.com">提供建议</a>
</li>
<li>
<form target="_blank" class="search-container" action="http://www.baidu.com/baidu" method="GET">
<input name="word" type="text" class="search" placeholder="搜索教案">
<input name="tn" type="hidden" value="bds">
<input name="cl" type="hidden" value="3">
<input name="ct" type="hidden" value="2097152">
<input name="si" type="hidden" value="www.newclass.org">
<input type="submit" class="do-search" value="搜索">
</form>
</li>
</ul>
</nav>
</header>