anchor.diff:      </br>
       <center>
         <p>
  -        <button type="submit" class="btn btn-success btn-lg">Submit</button>
  +        <button type="submit" class="btn btn-success btn-lg" onclick="cart_clear()">Submit</button>
         </p>
       </center>
   </form>
  
positive.code:   <%@items.each do |item|%>
     <tr>
     	  <td><%= item[0].id %></td>
     	  <td><%= item[0].title %></td>
     	  <td><%= item[0].price %> $</td>
     	  <td><%= item[0].size %></td>
     	  <td><%= item[1] %></td>
  
negative.code: <h2><center>Your cart</center></h2>
  <table class="table table-striped">
    <thead>
      <tr>
     	  <th>#</th>
  