<script>
    if (!sessionStorage.getItem('refreshed')) {
      sessionStorage.setItem('refreshed', 'true');
      location.reload();
    }
 </script>

<div id="page-container">
  <div class="data_div" id="myDiv" onclick="toggleDiv()">
    <%= image_tag 'title.png', style: 'width: 1192px; position: absolute; z-index: 1;' %>
    <div id="allmap" style="position: absolute;" ></div>
    <span class="data_time">
       <%= content_tag :span, id: "time" do %>
         <%= @time %>
       <% end %>
      </span>
     <span class="data_day"><%= @day %></span>
     <span class="data_week"><%= @today_weekday %></span>
     <div class="div_some">
       <div class="left_list">
         <div class="left_list_title">
           <em>进销存情况</em>
 ……
……

<script>
  if (!sessionStorage.getItem('refreshed')) {
     sessionStorage.setItem('refreshed', 'true');
     location.reload();
   }
</script>