If clause in a recursive function

I am trying to build a function which traverse a Dom tree if and only if the node name is not equal to script and style. here is the function:

      public static void PostOrderTR(Node node) throws XPathExpressionException, MalformedURLException, SAXNotRecognizedException, SAXNotSupportedException, ParserConfigurationException, IOException, SAXException
{

             if (node == null || node.getNodeName() == null)
                       {
                    return;
                       }
    if(!"script".equals(node.getNodeName())||!"style".equals(node.getLocalName())|| !"style".equals(node.getNodeName()))

             {
                 //do something
                  PostOrderTR(node.getFirstChild());
    }
               if(!"script".equals(node.getNodeName())||!"style".equals(node.getLocalName())|| !"style".equals(node.getNodeName()))

                    PostOrderTR(node.getNextSibling());

         }

but in practice, it results exactly opposite. it goes through all nodes including the script and style. I already tried to replace&& with || and nothing changed much.