Roo/form/Signature.js

diff --git a/Roo/form/Signature.js b/Roo/form/Signature.js
index e8a1dab..8b3ea55 100644 (file)
--- a/Roo/form/Signature.js
+++ b/Roo/form/Signature.js
@@ -285,6 +285,10 @@ Roo.extend(Roo.form.Signature, Roo.form.Field,  {
     // private
     // Subclasses should provide the validation implementation by overriding this
     validateValue : function(value){
+        if(this.allowBlank){
+            return true;
+        }
+        
         if(this.isConfirmed){
             return true;
         }