var myinput = $('#edit-name1').attr('autocomplete', 'OFF')[0];
var db = new Drupal.ACDB('http://localhost/myproject/?q=my/autocomplete');
var x = new Drupal.jsAC(myinput, db);
x.found = function (matches) {
  // If no value in the textfield, do not show the popup.
  if (!this.input.value.length) {
    return false;
  }

  // Prepare matches
  var ul = document.createElement('ul');
  var ac = this;
  for (key in matches) {
    var li = document.createElement('li');
    $(li)
      .html('<div>'+ matches[key]['display'] +'</div>')
      .mousedown(function () { ac.select(this); })
      .mouseover(function () { ac.highlight(this); })
      .mouseout(function () { ac.unhighlight(this); });
    li.autocompleteValue = key;
    li.info = matches[key]['info'];
    $(ul).append(li);
  }

  // Show popup with matches, if any
  if (this.popup) {
    if (ul.childNodes.length > 0) {
      $(this.popup).empty().append(ul).show();
    }
    else {
      $(this.popup).css({visibility: 'hidden'});
      this.hidePopup();
    }
  }
}

x.select = function (node) {
  this.input.value = node.autocompleteValue;
  this.info = node.info;
  var newdiv = $("<div></div>").addClass("messages status")
  .html("OK.");
  $("input#edit-email1").parent().fadeOut("slow").after(newdiv);
  $("#edit-uid1").val(this.info['uid']);
}