jQuery function for converting an unordered list of links to a select element 'jumpbox'

jquery.ul_to_select.js

jQuery.fn.ul_to_select = function(){
  return this.each(function(){
    var select_box  = document.createElement('select');
    select_box.id   = this.id + '_select'
    this.parentNode.insertBefore(select_box, this);
      $('<option></option>').html('Choose...').appendTo('#'+select_box.id);
    $(this).find('li a').each(function(link){
      $('<option></option>').html(this.innerHTML).attr('value', this.href).appendTo('#'+select_box.id);
    });
    this.parentNode.removeChild(this);
    $('#'+select_box.id).change(function(){
      document.location.href=$('#' + select_box.id + " option:selected").val();
      return false;
    });
  });
};