diff --git a/templates/upstock.hamlet b/templates/upstock.hamlet
index 2fe8447..af161e9 100644
--- a/templates/upstock.hamlet
+++ b/templates/upstock.hamlet
@@ -9,6 +9,5 @@ $doctype 5
   ^{upstockWidget}
   <div>
     <input type=submit value="_{MsgFillup}">
-    <input onclick="e=document.getElementById('hident2');e.value=parseInt(e.value)+1;" value="_{MsgIncrement}" type="button">
-    <input onclick="e=document.getElementById('hident2');e.value=(parseInt(e.value)>=1)?parseInt(e.value)-1:0;" value="_{MsgDecrement}" type="button">
-
+    <input onclick="crmnt( document.getElementById('hident2'), 1 )" value="_{MsgIncrement}" type="button">
+    <input onclick="crmnt( document.getElementById('hident2'), -1 )" value="_{MsgDecrement}" type="button">