var _ui =   {
    
    combobox:   false,
    
    init: {
        _:  function() {

            
        },
        
        combobox: {
            _:  function() {
                
                _ui.combobox || (_ui.combobox = true) &&
                    
                (function( $ ) {
                    $.widget( "ui.combobox", {
                        _create: function() {
                            var self = this,
                                select = this.element.hide(),
                                selected = select.children( ":selected" ),
                                value = selected.val() ? selected.text() : "";
                                value = selected.text();
                            var input = this.input = $( "<input>" )
                                .insertAfter( select )
                                .val( value )
                                .autocomplete({
                                    delay: 0,
                                    minLength: 0,
                                    source: function( request, response ) {
                                        var matcher = new RegExp( $.ui.autocomplete.escapeRegex(request.term), "i" );
                                        response( select.children( "option" ).map(function() {
                                            var text = $( this ).text();
                                            if ( this.value && ( !request.term || matcher.test(text) ) )
                                                return {
                                                    label: text.replace(
                                                        new RegExp(
                                                            "(?![^&;]+;)(?!<[^<>]*)(" +
                                                            $.ui.autocomplete.escapeRegex(request.term) +
                                                            ")(?![^<>]*>)(?![^&;]+;)", "gi"
                                                        ), "<strong>$1</strong>" ),
                                                    value: text,
                                                    option: this
                                                };
                                        }) );
                                    },
                                    select: function( event, ui ) {
                                        ui.item.option.selected = true;
                                        self._trigger( "selected", event, {
                                            item: ui.item.option
                                        });
                                    },
                                    change: function( event, ui ) {
                                        if ( !ui.item ) {
                                            var matcher = new RegExp( "^" + $.ui.autocomplete.escapeRegex( $(this).val() ) + "$", "i" ),
                                                valid = false;
                                            select.children( "option" ).each(function() {
                                                if ( $( this ).text().match( matcher ) ) {
                                                    this.selected = valid = true;
                                                    return false;
                                                }
                                            });
                                            if ( !valid ) {
                                                // remove invalid value, as it didn't match anything
                                                $( this ).val( "" );
                                                select.val( "" );
                                                input.data( "autocomplete" ).term = "";
                                                return false;
                                            }
                                        }
                                    }
                                })
                                .addClass( "ui-widget ui-widget-content ui-corner-left" );

                            input.data( "autocomplete" )._renderItem = function( ul, item ) {
                                return $( "<li></li>" )
                                    .data( "item.autocomplete", item )
                                    .append( "<a>" + item.label + "</a>" )
                                    .appendTo( ul );
                            };

                            this.button = $( "<button type='button'>&nbsp;</button>" )
                                .attr( "tabIndex", -1 )
                                .attr( "title", "Show All Items" )
                                .insertAfter( input )
                                .button({
                                    icons: {
                                        primary: "ui-icon-triangle-1-s"
                                    },
                                    text: false
                                })
                                //.removeClass( "ui-corner-all" )
                                //.addClass( "ui-corner-right ui-button-icon" )
                                .click(function() {
                                    // close if already visible
                                    if ( input.autocomplete( "widget" ).is( ":visible" ) ) {
                                        input.autocomplete( "close" );
                                        return;
                                    }

                                    // work around a bug (likely same cause as #5265)
                                    $( this ).blur();

                                    // pass empty string as value to search for, displaying all results
                                    input.autocomplete( "search", "" );
                                    input.focus();
                                });
                        },

                        destroy: function() {
                            this.input.remove();
                            this.button.remove();
                            this.element.show();
                            $.Widget.prototype.destroy.call( this );
                        }
                    });
                })( jQuery );
            }
        }
    }
}