Validate numeric code before form is submitted

The image generation script will reject any non-numeric seed as well
as any value larger than 2**32-1. So enforcing this up front at the
form will give the user a better experience.

diff --git a/index.html b/index.html
index 6bdd28b134138d24eb8568a49a4dfb328829c79f..59d87e12135605f9c612000527ae2c1ae7e44480 100644 (file)
--- a/index.html
+++ b/index.html
@@ -64,7 +64,7 @@
             <label for="code">
               Numeric code:
             </label>
-            <input id="code" type="text" autocomplete="off" placeholder="(Leave blank for random)" />
+            <input id="code" type="number" min="0" max="4294967295" autocomplete="off" placeholder="(Leave blank for random)" />
           </div>
         </div>