socialforge/app/views/layouts/_unlogin_header.html.erb

<div class="navHomepage">
  <div class="navHomepageLogo fl">
    <%=link_to image_tag("../images/logo.png",width:"51px", height: "45px",class: "mt3"), signin_path%>
  </div>
  <div class="fl">
    <ul>
      <li class="navHomepageMenu fl">
        <a href="http://forge.trustie.net/forums/1/memos/1168" class="c_white f16">帮助中心</a>
      </li>
    </ul>
  </div>
 <script>
     function search(doc){
         //alert(1)
        // val = $('input:radio[name="search_type"]:checked').val();
        // alert(2)
        // $("#search_type").val(val);
       //  alert(3)
         $(doc).parent().submit();
     }
     <% type = type%>
     $(document).ready(function (){
         if('<%= type %>' != null && '<%= type %>' == 'courses' ){
             $('input:radio[value="courses"]').attr('checked','checked');
         }
         if('<%= type %>' != null && '<%= type %>' == 'projects' ){
             $('input:radio[value="projects"]').attr('checked','checked');
         }
         if('<%= type %>' != null && '<%= type %>' == 'users' ){
             $('input:radio[value="users"]').attr('checked','checked');
         }
     });
 </script>
  <div class="fl" id="navHomepageSearch">
    <!--<form class="navHomepageSearchBox">-->
    <% name = name%>

    <%= form_tag({controller: :welcome, action: :search },:class=>'navHomepageSearchBox', method: :get) do %>
      <input type="text" name="q" value="<%= name.nil? ? "" : name%>" class="navHomepageSearchInput"/>
      <input type="hidden" name="search_type" id="type" value=""/>
      <a href="javascript:void(0);" class="homepageSearchIcon" onclick="$('#type').val($('input[type=radio]:checked').val());$(this).parent().submit();"></a>
    <% end %>
    <div class="navSearchTypeBox" id="navHomepageSearchType">
      <div class="fl mr15 mt8">
        <input type="radio" value="courses" name="search_type"  checked/>
        课程
      </div>
      <div class="fl mr15 mt8">
        <input type="radio" value="projects" name="search_type" />
        项目
      </div>
      <div class="fl mr15 mt8">
        <input type="radio" value="users" name="search_type" />
        用户
      </div>
      <div id="navSearchAlert" class="fr mr10">
        <span class="c_red">请选择搜索类型</span>
      </div>
    </div>

  </div>
  <div id="loginInButton" class="fr ml20">
    <a href="<%= signin_path(:login=>true) %>" class="c_white db">登录</a>
  </div>
  <div id="loginSignButton" class="fr">
    <a href="<%= signin_path(:login=>false) %>" class="c_white db">注册</a>
  </div>
</div>

<script type="text/javascript">
    //搜索相关
    $("#navHomepageSearch").mouseover(function(){
        $("#navHomepageSearchType").show();
    }).mouseout(function(){
        $("#navHomepageSearchType").hide();
    });

</script>