first commit

plugins/jquery-validation/additional/nipPL.js

@@ -0,0 +1,22 @@
+/*
+ * Numer identyfikacji podatkowej ( NIP ) is the way tax identification used in Poland for companies
+ */
+$.validator.addMethod( "nipPL", function( value ) {
+	"use strict";
+
+	value = value.replace( /[^0-9]/g, "" );
+
+	if ( value.length !== 10 ) {
+		return false;
+	}
+
+	var arrSteps = [ 6, 5, 7, 2, 3, 4, 5, 6, 7 ];
+	var intSum = 0;
+	for ( var i = 0; i < 9; i++ ) {
+		intSum += arrSteps[ i ] * value[ i ];
+	}
+	var int2 = intSum % 11;
+	var intControlNr = ( int2 === 10 ) ? 0 : int2;
+
+	return ( intControlNr === parseInt( value[ 9 ], 10 ) );
+}, "Please specify a valid NIP number." );