Add find by PIS Code

pis.html

@@ -43,9 +43,9 @@
     </div>
 
     <div id="crs-box">
-        <p>Enter a services start and end station CRS codes to see code options and stopping patterns.</p>
         <p>Currently supported (Beta): GWR: ex-Wessex, HEx<br>Duplicate stopping patterns have been removed.</p>
         <p id="auth-required">You need to be logged into a free <a href="./settings.html#railstaff">rail staff version</a> account for this feature.</p>
+        <h3>Search by CRS Codes</h3>  
           <form action="javascript:findByOrigDest();">
             <div id="crs-inputs">
               <div class="crs-input">
@@ -59,6 +59,16 @@
             </div>
             <button type="submit" value="Find" class="lookup-button">Submit</button>
           </form>
+        <h3>Search by PIS Code</h3>
+          <form action="javascript:findByPisCode();">
+            <div id="crs-inputs">
+              <div class="crs-input">
+                <label for="pis">PIS Code:</label><br>
+                <input type="number" class="small-lookup-box pis-input" id="pis" name="pis" maxlength="4" autocomplete="off"><br><br>
+              </div>
+            </div>
+            <button type="submit" value="Find" class="lookup-button">Submit</button>
+          </form>
     </div>
 
     <div id="result-box">