fix date validation

process/Date_lib/process.js

@@ -20,7 +20,8 @@ function DateUtils() {}
 DateUtils.validateBeginnBeforeEnd = function(pStart, pEnd) {
     if (!pStart || !pEnd) 
         return true;
-    return pStart <= pEnd;
+    
+    return parseInt(pStart) <= parseInt(pEnd);
 }
 
 DateUtils.getValidationFailString = function() {