make absolute url and adding RpnType hidden field.

form/rpnAskNameAndCard.tmpl

   {{ template "Header" }}
     {{ template "Menu" }} 
    <h2></h2>  
-    <form method="POST" action="rpnNameAndCard">
+    <form method="POST" action="/rpnNameAndCard">
       <input type="hidden" name="uid" value="{{ .Id }}" />
       <label> 账户姓名 </label><input type="text" name="name" value="zhang3"  /><br />
       <label> 银行卡号 </label><input type="text" name="card" value="6212262002002377849"  /><br />
-      <input type=hidden name="id", value="{{.id}}" />
-      <input type=hidden name="si" value="{{.signature}}" />
+      <input type=hidden name="id", value="{{.Id}}" />
+      <input type=hidden name="sign" value="{{.Sign}}" />
+      <input type=hidden name="rpnType" value="{{.RpnType}}" />
       <input type="submit" value="下一步" />
     </form><br />    
   {{ template "Footer" }}