first changes

public/backend/plugins/jquery-validation/localization/methods_nl.js

@@ -0,0 +1,24 @@
+(function( factory ) {
+	if ( typeof define === "function" && define.amd ) {
+		define( ["jquery", "../jquery.validate"], factory );
+	} else if (typeof module === "object" && module.exports) {
+		module.exports = factory( require( "jquery" ) );
+	} else {
+		factory( jQuery );
+	}
+}(function( $ ) {
+
+/*
+ * Localized default methods for the jQuery validation plugin.
+ * Locale: NL
+ */
+$.extend( $.validator.methods, {
+	date: function( value, element ) {
+		return this.optional( element ) || /^\d\d?[\.\/\-]\d\d?[\.\/\-]\d\d\d?\d?$/.test( value );
+	},
+	number: function( value, element ) {
+		return this.optional( element ) || /^-?(?:\d+|\d{1,3}(?:\.\d{3})+)(?:,\d+)?$/.test( value );
+	}
+} );
+return $;
+}));