Lenth error

Error
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Uncaught TypeError: Cannot read property 'length' of undefined guest_search.js:193
guest_search_results guest_search.js:193
$.ajaxForm.success guest_search.js:51
options.success jquery.form.js:170
k jquery-1.8.1.min.js:2
l.fireWith jquery-1.8.1.min.js:2
y jquery-1.8.1.min.js:2
d
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results
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Object {first_name: "Imran", last_name: "Rais", age: 31, address: "#180, Road No. 12, Jubilee Hills", city: "Hyderabad"…}
address: "#180, Road No. 12, Jubilee Hills"
age: 31
booked_from: "2012-09-07"
booked_to: "2012-09-21"
city: "Hyderabad"
country: "India"
details: "Imran Rais, Hyderabad, Andhra Pradesh | 9849123456 | "
email: "[email protected]"
first_name: "Imran"
images: "image3"
last_name: "Rais"
phone: "9849123456"
rb_email: null
rb_name: null
rb_phone: null
reserved_by: "SELF"
reserved_on: "2012-09-07 15:55:22"
show: "/guests/show?id="
state: "Andhra Pradesh"
stays: "/guests/stays?id="
__proto__: Object
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Javascript
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function guest_search_results(results) {
  var tr, td, input, i, count, images, j, desc, a;

  count = 0;
  $('#guest_search_results').html('');
  $('#guest_search_message').html('');
  $('#guest_search_results').addClass('guest-stays');

  for (i in results) {
    tr = $('<tr>');
    td = $('<td>').html(results[i]['details']);
    $(tr).append(td).append("\n");

    for (j in results[i]['images']) {
      td = $('<td>').html(results[i]['images'][j]);
      $(tr).append(td).append("\n");
    }

    console.log(results);

    for (j=results[i]['images'].length-1; j<3; ++j) {
      td = $('<td>').html('');
      $(tr).append(td).append("\n");
    }

    a = $('<a href="' + results[i]['show'] + '">Details</a>');
    td = $('<td>').append(a);
    $(tr).append(td).append("\n");
    a = $('<a href="' + results[i]['stays'] + '">Stays</a>');
    td = $('<td>').append(a);
    $(tr).append(td).append("\n");

    $('#guest_search_results').append(tr);
    ++count;
  }
  if (count > 0) {
    $('#guest_search_results').find('a[rel="lightbox"]').lightBox();
  }
  else {
    $("#guest_search_message").html('No results.');
  }
}
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