This gives pajax functionality

pajax.js

  // pajax functionality
  function pajaxForm(form) {
    var url = form.attr("action");
    var target = form.data("pajax");
    form.ajaxSubmit({
      type: "POST",
      url: url,
      target: "*[data-pajax-target=" + target + "]"
    });
  };
  $("body").delegate("form[data-pajax]", "submit", function(event) {
    event.preventDefault();
    pajaxForm($(this));
  });

  // <form data-pajax..> attribute handling
  $("body").delegate("form[data-pajax] :input[data-pajax-change]", "change", function(event) {
    var form = $(this).closest("form[data-pajax]");
    pajaxForm(form);
  });

  // general purpose ajax form submit, including file upload
  $.fn.ajaxSubmit = function(options) {
    if (!this.length) { return this; }
    this.bind("submit", function(event) { event.preventDefault(); });

    var inputs = this.find(':input:enabled');
    var formData = new FormData();
    $.each(inputs, function() {
      if (!this.name) { return; }
      if (this.files) {
        formData.append(this.name, this.files[0]);
      } else if (this.type == "radio") {
        if (this.checked) {
          formData.append(this.name, $(this).val());
        }
      } else if (this.type == "select-one") {
          if (this.selectedIndex !== undefined) {
            formData.append(this.name, this.options[this.selectedIndex].value);
          }
      } else {
        formData.append(this.name, this.value);
      }
    });

    $.ajax({
      type: "POST",
      url: options.url,
      beforeSend: function(xhr, o) {
        o.data = formData;
      },
      success: function(data) {
        pathToNode(document.activeElement).then(function(refocusPath) {
          $(options.target).replaceWith(data);
          $(refocusPath).focus();
        });
      }
    });
  };