How to save form to cookies, restore form from cookies. Requires jQuery and jQuery Cookie plugin.

emacs.css

.highlight .hll { background-color: #ffffcc }
.highlight  { background: #f8f8f8; }
.highlight .c { color: #008800; font-style: italic } /* Comment */
.highlight .err { border: 1px solid #FF0000 } /* Error */
.highlight .k { color: #AA22FF; font-weight: bold } /* Keyword */
.highlight .o { color: #666666 } /* Operator */
.highlight .cm { color: #008800; font-style: italic } /* Comment.Multiline */
.highlight .cp { color: #008800 } /* Comment.Preproc */
.highlight .c1 { color: #008800; font-style: italic } /* Comment.Single */
.highlight .cs { color: #008800; font-weight: bold } /* Comment.Special */
.highlight .gd { color: #A00000 } /* Generic.Deleted */
.highlight .ge { font-style: italic } /* Generic.Emph */
.highlight .gr { color: #FF0000 } /* Generic.Error */
.highlight .gh { color: #000080; font-weight: bold } /* Generic.Heading */
.highlight .gi { color: #00A000 } /* Generic.Inserted */
.highlight .go { color: #808080 } /* Generic.Output */
.highlight .gp { color: #000080; font-weight: bold } /* Generic.Prompt */
.highlight .gs { font-weight: bold } /* Generic.Strong */
.highlight .gu { color: #800080; font-weight: bold } /* Generic.Subheading */
.highlight .gt { color: #0040D0 } /* Generic.Traceback */
.highlight .kc { color: #AA22FF; font-weight: bold } /* Keyword.Constant */
.highlight .kd { color: #AA22FF; font-weight: bold } /* Keyword.Declaration */
.highlight .kn { color: #AA22FF; font-weight: bold } /* Keyword.Namespace */
.highlight .kp { color: #AA22FF } /* Keyword.Pseudo */
.highlight .kr { color: #AA22FF; font-weight: bold } /* Keyword.Reserved */
.highlight .kt { color: #00BB00; font-weight: bold } /* Keyword.Type */
.highlight .m { color: #666666 } /* Literal.Number */
.highlight .s { color: #BB4444 } /* Literal.String */
.highlight .na { color: #BB4444 } /* Name.Attribute */
.highlight .nb { color: #AA22FF } /* Name.Builtin */
.highlight .nc { color: #0000FF } /* Name.Class */
.highlight .no { color: #880000 } /* Name.Constant */
.highlight .nd { color: #AA22FF } /* Name.Decorator */
.highlight .ni { color: #999999; font-weight: bold } /* Name.Entity */
.highlight .ne { color: #D2413A; font-weight: bold } /* Name.Exception */
.highlight .nf { color: #00A000 } /* Name.Function */
.highlight .nl { color: #A0A000 } /* Name.Label */
.highlight .nn { color: #0000FF; font-weight: bold } /* Name.Namespace */
.highlight .nt { color: #008000; font-weight: bold } /* Name.Tag */
.highlight .nv { color: #B8860B } /* Name.Variable */
.highlight .ow { color: #AA22FF; font-weight: bold } /* Operator.Word */
.highlight .w { color: #bbbbbb } /* Text.Whitespace */
.highlight .mf { color: #666666 } /* Literal.Number.Float */
.highlight .mh { color: #666666 } /* Literal.Number.Hex */
.highlight .mi { color: #666666 } /* Literal.Number.Integer */
.highlight .mo { color: #666666 } /* Literal.Number.Oct */
.highlight .sb { color: #BB4444 } /* Literal.String.Backtick */
.highlight .sc { color: #BB4444 } /* Literal.String.Char */
.highlight .sd { color: #BB4444; font-style: italic } /* Literal.String.Doc */
.highlight .s2 { color: #BB4444 } /* Literal.String.Double */
.highlight .se { color: #BB6622; font-weight: bold } /* Literal.String.Escape */
.highlight .sh { color: #BB4444 } /* Literal.String.Heredoc */
.highlight .si { color: #BB6688; font-weight: bold } /* Literal.String.Interpol */
.highlight .sx { color: #008000 } /* Literal.String.Other */
.highlight .sr { color: #BB6688 } /* Literal.String.Regex */
.highlight .s1 { color: #BB4444 } /* Literal.String.Single */
.highlight .ss { color: #B8860B } /* Literal.String.Symbol */
.highlight .bp { color: #AA22FF } /* Name.Builtin.Pseudo */
.highlight .vc { color: #B8860B } /* Name.Variable.Class */
.highlight .vg { color: #B8860B } /* Name.Variable.Global */
.highlight .vi { color: #B8860B } /* Name.Variable.Instance */
.highlight .il { color: #666666 } /* Literal.Number.Integer.Long */

save-to-cookies.js

(function($){
  $.fn.serializeJSON = function() {
    var json = {};
    jQuery.map($(this).serializeArray(), function(n, i) {
      json[n['name']] = n['value'];
    });
    return json;
  };
})(jQuery);

if (typeof String.prototype.startsWith != 'function') {
  String.prototype.startsWith = function (str){
    return this.slice(0, str.length) == str;
  };
}

if (typeof String.prototype.endsWith != 'function') {
  String.prototype.endsWith = function (str){
    return this.slice(-str.length) == str;
  };
}

ensureNumber = function(n) {
  n = parseInt(n, 10);
  if (isNaN(n) || n <= 0) { n = 0; }
  return n;
}

saveFormToCookies = function(name) {
  $.cookie(name, JSON.stringify($('form input[name^=' + name + ']').serializeJSON()), { expires: 365 });
}

loadFormFromCookies = function(name) {
  try {
    JSON.parse($.cookie(name), function(key, value) {
      if (key.startsWith(name)) {
        var el = $('input[name="'+key+'"][type!=hidden]#');

        if (el.attr('type') == 'checkbox') {
          el.attr('checked', value == 1 ? true : false);
        } else {
          el.val(ensureNumber(value));
        }
      }
    });
  } catch(e) {
    $.cookie(name, null);
  }
}