// ==UserScript==
// @name           The TCP/IP Guide fix
// @namespace      jah
// @description    Adds valign=top to the td element holding the main page content thereby removing the large block of whitespace above that content.
// @include        http://www.tcpipguide.com/free/*
// ==/UserScript==


window.addEventListener('load',

  function ()
  {
    var tds = document.getElementsByTagName('td');
    for ( var i = 0; i < tds.length; i++ )
    {
      var td = tds[i];
      if (td != undefined && td.parentNode != undefined &&
      td.parentNode.parentNode != undefined &&
      td.parentNode.parentNode.parentNode != undefined &&
      td.parentNode.parentNode.parentNode.parentNode != undefined &&
      td.parentNode.parentNode.parentNode.parentNode.nodeName.toLowerCase() == 'body')
      {
        if ((td.getAttribute('vAlign') == undefined ||
        td.getAttribute('vAlign').toLowerCase() != 'top') &&
        td.previousSibling != undefined &&
        td.previousSibling.offsetWidth == 165)
        {
          td.setAttribute('vAlign', 'top');
        }
      }
    }
  },
  true
);