jQuery.fn.loadSerializedData.js

jQuery.fn.loadSerializedData = function(data)
{
  var dataObj = {},
      keyValPair;
  data = data.split('&');
  for (var i = 0, length = data.length; i < length; i++) {
    keyValPair = data[i].split('=');
    dataObj[decodeURIComponent(keyValPair[0])] = decodeURIComponent(keyValPair[1]);
  }
  
  // Loop thru form and assign each HTML tag the appropriate value
  $(this).find(':input').each(function() {
    if (dataObj[$(this).attr('name')])
      $(this).val(dataObj[$(this).attr('name')]);
  });
};

//select your form in console first
$($0).loadSerializedData("output of form.serialize() function");