issue模块中，搜索问题时，给出提示信息“请输入问题名称”

app/views/issues/index.html.erb

@@ -47,7 +47,7 @@
       <%= form_tag({:controller => 'issues', :action => 'index', :project_id => @project},:remote=>'true', :method => :get,:id=>"issue_query_form", :class => 'query_form') do %>
           <%= hidden_field_tag 'set_filter', '1' %>
           <div class="problem_search" >
-            <input class="problem_search_input fl" id="v_subject" type="text" name="subject" value="<%= @subject ? @subject : ""%>" onkeypress="EnterPress(event)" onkeydown="EnterPress()">
+            <input class="problem_search_input fl" id="v_subject" type="text" name="subject" placeholder="请输入问题名称" onkeypress="EnterPress(event)" onkeydown="EnterPress()">
             <a href="javascript:void(0)" class="problem_search_btn fl" onclick="remote_function();" >搜索</a>
             <a href="javascript:void(0)" class="grey_btn fl ml10" onclick="nh_reset_form();" >清空</a>
           </div><!--problem_search end-->