/*
 * jQuery UI Selectmenu version 1.4.0pre
 *
 * Copyright (c) 2009-2010 filament group, http://filamentgroup.com
 * Copyright (c) 2010-2012 Felix Nagel, http://www.felixnagel.com
 * Licensed under the MIT (MIT-LICENSE.txt)
 *
 * https://github.com/fnagel/jquery-ui/wiki/Selectmenu
 */

(function( $ ) {

$.widget("ui.selectmenu", {
	options: {
		appendTo: "body",
		typeAhead: 1000,
		style: 'dropdown',
		positionOptions: null,
		width: null,
		menuWidth: null,
		handleWidth: 26,
		maxHeight: null,
		icons: null,
		format: null,
		escapeHtml: false,
		bgImage: function() {}
	},

	_create: function() {
		var self = this, o = this.options;

		// set a default id value, generate a new random one if not set by developer
		var selectmenuId = ( this.element.attr( 'id' ) || 'ui-selectmenu-' + Math.random().toString( 16 ).slice( 2, 10 ) ).replace( /(:|\.)/g, '' )

		// quick array of button and menu id's
		this.ids = [ selectmenuId, selectmenuId + '-button', selectmenuId + '-menu' ];

		// define safe mouseup for future toggling
		this._safemouseup = true;
		this.isOpen = false;

		// create menu button wrapper
		this.newelement = $( '<a />', {
			'class': 'ui-selectmenu ui-widget ui-state-default ui-corner-all',
			'id' : this.ids[ 1 ],
			'role': 'button',
			'href': '#nogo',
			'tabindex': this.element.attr( 'disabled' ) ? 1 : 0,
			'aria-haspopup': true,
			'aria-owns': this.ids[ 2 ]
		});
		this.newelementWrap = $( "<span />" )
			.append( this.newelement )
			.insertAfter( this.element );

		// transfer tabindex
		var tabindex = this.element.attr( 'tabindex' );
		if ( tabindex ) {
			this.newelement.attr( 'tabindex', tabindex );
		}

		// save reference to select in data for ease in calling methods
		this.newelement.data( 'selectelement', this.element );

		// menu icon
		this.selectmenuIcon = $( '<span class="ui-selectmenu-icon ui-icon"></span>' )
			.prependTo( this.newelement );

		// append status span to button
		this.newelement.prepend( '<span class="ui-selectmenu-status" />' );

		// make associated form label trigger focus
		this.element.bind({
			'click.selectmenu':  function( event ) {
				self.newelement.focus();
				event.preventDefault();
			}
		});

		// click toggle for menu visibility
		this.newelement
			.bind( 'mousedown.selectmenu', function( event ) {
				self._toggle( event, true );
				// make sure a click won't open/close instantly
				if ( o.style == "popup" ) {
					self._safemouseup = false;
					setTimeout( function() { self._safemouseup = true; }, 300 );
				}

				event.preventDefault();
			})
			.bind( 'click.selectmenu', function( event ) {
				event.preventDefault();
			})
			.bind( "keydown.selectmenu", function( event ) {
				var ret = false;
				switch ( event.keyCode ) {
					case $.ui.keyCode.ENTER:
						ret = true;
						break;
					case $.ui.keyCode.SPACE:
						self._toggle( event );
						break;
					case $.ui.keyCode.UP:
						if ( event.altKey ) {
							self.open( event );
						} else {
							self._moveSelection( -1 );
						}
						break;
					case $.ui.keyCode.DOWN:
						if ( event.altKey ) {
							self.open( event );
						} else {
							self._moveSelection( 1 );
						}
						break;
					case $.ui.keyCode.LEFT:
						self._moveSelection( -1 );
						break;
					case $.ui.keyCode.RIGHT:
						self._moveSelection( 1 );
						break;
					case $.ui.keyCode.TAB:
						ret = true;
						break;
					case $.ui.keyCode.PAGE_UP:
					case $.ui.keyCode.HOME:
						self.index( 0 );
						break;
					case $.ui.keyCode.PAGE_DOWN:
					case $.ui.keyCode.END:
						self.index( self._optionLis.length );
						break;
					default:
						ret = true;
				}
				return ret;
			})
			.bind( 'keypress.selectmenu', function( event ) {
				if ( event.which > 0 ) {
					self._typeAhead( event.which, 'mouseup' );
				}
				return true;
			})
			.bind( 'mouseover.selectmenu', function() {
				if ( !o.disabled ) $( this ).addClass( 'ui-state-hover' );
			})
			.bind( 'mouseout.selectmenu', function() {
				if ( !o.disabled ) $( this ).removeClass( 'ui-state-hover' );
			})
			.bind( 'focus.selectmenu', function() {
				if ( !o.disabled ) $( this ).addClass( 'ui-state-focus' );
			})
			.bind( 'blur.selectmenu', function() {
				if (!o.disabled) $( this ).removeClass( 'ui-state-focus' );
			});

		// document click closes menu
		$( document ).bind( "mousedown.selectmenu-" + this.ids[ 0 ], function( event ) {
			//check if open and if the clicket targes parent is the same
			if ( self.isOpen && self.ids[ 1 ] != event.target.offsetParent.id ) {
				self.close( event );
			}
		});

		// change event on original selectmenu
		this.element
			.bind( "click.selectmenu", function() {
				self._refreshValue();
			})
			// FIXME: newelement can be null under unclear circumstances in IE8
			// TODO not sure if this is still a problem (fnagel 20.03.11)
			.bind( "focus.selectmenu", function() {
				if ( self.newelement ) {
					self.newelement[ 0 ].focus();
				}
			});

		// set width when not set via options
		if ( !o.width ) {
			o.width = this.element.outerWidth();
		}
		// set menu button width
		this.newelement.width( o.width );

		// hide original selectmenu element
		this.element.hide();

		// create menu portion, append to body
		this.list = $( '<ul />', {
			'class': 'ui-widget ui-widget-content',
			'aria-hidden': true,
			'role': 'listbox',
			'aria-labelledby': this.ids[ 1 ],
			'id': this.ids[ 2 ]
		});
		this.listWrap = $( "<div />", {
			'class': 'ui-selectmenu-menu'
		}).append( this.list ).appendTo( o.appendTo );

		// transfer menu click to menu button
		this.list
			.bind("keydown.selectmenu", function(event) {
				var ret = false;
				switch ( event.keyCode ) {
					case $.ui.keyCode.UP:
						if ( event.altKey ) {
							self.close( event, true );
						} else {
							self._moveFocus( -1 );
						}
						break;
					case $.ui.keyCode.DOWN:
						if ( event.altKey ) {
							self.close( event, true );
						} else {
							self._moveFocus( 1 );
						}
						break;
					case $.ui.keyCode.LEFT:
						self._moveFocus( -1 );
						break;
					case $.ui.keyCode.RIGHT:
						self._moveFocus( 1 );
						break;
					case $.ui.keyCode.HOME:
						self._moveFocus( ':first' );
						break;
					case $.ui.keyCode.PAGE_UP:
						self._scrollPage( 'up' );
						break;
					case $.ui.keyCode.PAGE_DOWN:
						self._scrollPage( 'down' );
						break;
					case $.ui.keyCode.END:
						self._moveFocus( ':last' );
						break;
					case $.ui.keyCode.ENTER:
					case $.ui.keyCode.SPACE:
						self.close( event, true);
						$( event.target ).parents( 'li:eq(0)' ).trigger( 'mouseup' );
						break;
					case $.ui.keyCode.TAB:
						ret = true;
						self.close( event, true );
						$( event.target ).parents( 'li:eq(0)' ).trigger( 'mouseup' );
						break;
					case $.ui.keyCode.ESCAPE:
						self.close( event, true );
						break;
					default:
						ret = true;
				}
				return ret;
			})
			.bind( 'keypress.selectmenu', function( event ) {
				if ( event.which > 0 ) {
					self._typeAhead( event.which, 'focus' );
				}
				return true;
			})
			// this allows for using the scrollbar in an overflowed list
			.bind( 'mousedown.selectmenu mouseup.selectmenu', function() { return false; });

		// needed when window is resized
		$( window ).bind( "resize.selectmenu-" + this.ids[ 0 ], $.proxy( self.close, this ) );
	},

	_init: function() {
		var self = this, o = this.options;

		// serialize selectmenu element options
		var selectOptionData = [];
		this.element.find( 'option' ).each( function() {
			var opt = $( this );
			selectOptionData.push({
				value: opt.attr( 'value' ),
				text: self._formatText( opt.text(), opt ),
				selected: opt.attr( 'selected' ),
				disabled: opt.attr( 'disabled' ),
				classes: opt.attr( 'class' ),
				typeahead: opt.attr( 'typeahead'),
				parentOptGroup: opt.parent( 'optgroup' ),
				bgImage: o.bgImage.call( opt )
			});
		});

		// active state class is only used in popup style
		var activeClass = ( self.options.style == "popup" ) ? " ui-state-active" : "";

		// empty list so we can refresh the selectmenu via selectmenu()
		this.list.html( "" );

		// write li's
		if ( selectOptionData.length ) {
			for ( var i = 0; i < selectOptionData.length; i++ ) {
				var thisLiAttr = { role : 'presentation' };
				if ( selectOptionData[ i ].disabled ) {
					thisLiAttr[ 'class' ] = 'ui-state-disabled';
				}
				var thisAAttr = {
					html: selectOptionData[ i ].text || '&nbsp;',
					href: '#nogo',
					tabindex : -1,
					role: 'option',
					'aria-selected' : false
				};
				if ( selectOptionData[ i ].disabled ) {
					thisAAttr[ 'aria-disabled' ] = selectOptionData[ i ].disabled;
				}
				if ( selectOptionData[ i ].typeahead ) {
					thisAAttr[ 'typeahead' ] = selectOptionData[ i ].typeahead;
				}
				var thisA = $( '<a/>', thisAAttr )
					.bind( 'focus.selectmenu', function() {
						$( this ).parent().mouseover();
					})
					.bind( 'blur.selectmenu', function() {
						$( this ).parent().mouseout();
					});
				var thisLi = $( '<li/>', thisLiAttr )
					.append( thisA )
					.data( 'index', i )
					.addClass( selectOptionData[ i ].classes )
					.data( 'optionClasses', selectOptionData[ i ].classes || '' )
					.bind( "mouseup.selectmenu", function( event ) {
						if ( self._safemouseup && !self._disabled( event.currentTarget ) && !self._disabled( $( event.currentTarget ).parents( "ul > li.ui-selectmenu-group " ) ) ) {
							self.index( $( this ).data( 'index' ) );
							self.select( event );
							self.close( event, true );
						}
						return false;
					})
					.bind( "click.selectmenu", function() {
						return false;
					})
					.bind('mouseover.selectmenu', function( e ) {
						// no hover if diabled
						if ( !$( this ).hasClass( 'ui-state-disabled' ) && !$( this ).parent( "ul" ).parent( "li" ).hasClass( 'ui-state-disabled' ) ) {
							e.optionValue = self.element[ 0 ].options[ $( this ).data( 'index' ) ].value;
							self._trigger( "hover", e, self._uiHash() );
							self._selectedOptionLi().addClass( activeClass );
							self._focusedOptionLi().removeClass( 'ui-selectmenu-item-focus ui-state-hover' );
							$( this ).removeClass( 'ui-state-active' ).addClass( 'ui-selectmenu-item-focus ui-state-hover' );
						}
					})
					.bind( 'mouseout.selectmenu', function( e ) {
						if ( $( this ).is( self._selectedOptionLi() ) ) {
							$( this ).addClass( activeClass );
						}
						e.optionValue = self.element[ 0 ].options[ $( this ).data( 'index' ) ].value;
						self._trigger( "blur", e, self._uiHash() );
						$( this ).removeClass( 'ui-selectmenu-item-focus ui-state-hover' );
					});

				// optgroup or not...
				if ( selectOptionData[ i ].parentOptGroup.length ) {
					var optGroupName = 'ui-selectmenu-group-' + this.element.find( 'optgroup' ).index( selectOptionData[ i ].parentOptGroup );
					if ( this.list.find( 'li.' + optGroupName ).length ) {
						this.list.find( 'li.' + optGroupName + ':last ul' ).append( thisLi );
					} else {
						$( '<li role="presentation" class="ui-selectmenu-group ' + optGroupName + ( selectOptionData[ i ].parentOptGroup.attr( "disabled" ) ? ' ' + 'ui-state-disabled" aria-disabled="true"' : '"' ) + '><span class="ui-selectmenu-group-label">' + selectOptionData[ i ].parentOptGroup.attr( 'label' ) + '</span><ul></ul></li>' )
							.appendTo( this.list )
							.find( 'ul' )
							.append( thisLi );
					}
				} else {
					thisLi.appendTo( this.list );
				}

				// append icon if option is specified
				if ( o.icons ) {
					for ( var j in o.icons ) {
						if (thisLi.is(o.icons[ j ].find)) {
							thisLi
								.data( 'optionClasses', selectOptionData[ i ].classes + ' ui-selectmenu-hasIcon' )
								.addClass( 'ui-selectmenu-hasIcon' );
							var iconClass = o.icons[ j ].icon || "";
							thisLi
								.find( 'a:eq(0)' )
								.prepend( '<span class="ui-selectmenu-item-icon ui-icon ' + iconClass + '"></span>' );
							if ( selectOptionData[ i ].bgImage ) {
								thisLi.find( 'span' ).css( 'background-image', selectOptionData[ i ].bgImage );
							}
						}
					}
				}
			}
		} else {
			$(' <li role="presentation"><a href="#nogo" tabindex="-1" role="option"></a></li>' ).appendTo( this.list );
		}
		// we need to set and unset the CSS classes for dropdown and popup style
		var isDropDown = ( o.style == 'dropdown' );
		this.newelement
			.toggleClass( 'ui-selectmenu-dropdown', isDropDown )
			.toggleClass( 'ui-selectmenu-popup', !isDropDown );
		this.list
			.toggleClass( 'ui-selectmenu-menu-dropdown ui-corner-bottom', isDropDown )
			.toggleClass( 'ui-selectmenu-menu-popup ui-corner-all', !isDropDown )
			// add corners to top and bottom menu items
			.find( 'li:first' )
			.toggleClass( 'ui-corner-top', !isDropDown )
			.end().find( 'li:last' )
			.addClass( 'ui-corner-bottom' );
		this.selectmenuIcon
			.toggleClass( 'ui-icon-triangle-1-s', isDropDown )
			.toggleClass( 'ui-icon-triangle-2-n-s', !isDropDown );

		// set menu width to either menuWidth option value, width option value, or select width
		if ( o.style == 'dropdown' ) {
			this.list.width( o.menuWidth ? o.menuWidth : o.width );
		} else {
			this.list.width( o.menuWidth ? o.menuWidth : o.width - o.handleWidth );
		}

		// reset height to auto
		this.list.css( 'height', 'auto' );
		var listH = this.listWrap.height();
		var winH = $( window ).height();
		// calculate default max height
		var maxH = o.maxHeight ? Math.min( o.maxHeight, winH ) : winH / 3;
		if ( listH > maxH ) this.list.height( maxH );

		// save reference to actionable li's (not group label li's)
		this._optionLis = this.list.find( 'li:not(.ui-selectmenu-group)' );

		// transfer disabled state
		if ( this.element.attr( 'disabled' ) ) {
			this.disable();
		} else {
			this.enable();
		}

		// update value
		this._refreshValue();

		// set selected item so movefocus has intial state
		this._selectedOptionLi().addClass( 'ui-selectmenu-item-focus' );

		// needed when selectmenu is placed at the very bottom / top of the page
		clearTimeout( this.refreshTimeout );
		this.refreshTimeout = window.setTimeout( function () {
			self._refreshPosition();
		}, 200 );
	},

	destroy: function() {
		this.element.removeData( this.widgetName )
			.removeClass( 'ui-selectmenu-disabled' + ' ' + 'ui-state-disabled' )
			.removeAttr( 'aria-disabled' )
			.unbind( ".selectmenu" );

		$( window ).unbind( ".selectmenu-" + this.ids[ 0 ] );
		$( document ).unbind( ".selectmenu-" + this.ids[ 0 ] );

		this.newelementWrap.remove();
		this.listWrap.remove();

		// unbind click event and show original select
		this.element
			.unbind( ".selectmenu" )
			.show();

		// call widget destroy function
		$.Widget.prototype.destroy.apply( this, arguments );
	},

	_typeAhead: function( code, eventType ) {
		var self = this,
			c = String.fromCharCode( code ).toLowerCase(),
			matchee = null,
			nextIndex = null;

		// Clear any previous timer if present
		if ( self._typeAhead_timer ) {
			window.clearTimeout( self._typeAhead_timer );
			self._typeAhead_timer = undefined;
		}
		// Store the character typed
		self._typeAhead_chars = ( self._typeAhead_chars === undefined ? "" : self._typeAhead_chars ).concat( c );
		// Detect if we are in cyciling mode or direct selection mode
		if ( self._typeAhead_chars.length < 2 || ( self._typeAhead_chars.substr( -2, 1 ) === c && self._typeAhead_cycling ) ) {
			self._typeAhead_cycling = true;
			// Match only the first character and loop
			matchee = c;
		} else {
			// We won't be cycling anymore until the timer expires
			self._typeAhead_cycling = false;
			// Match all the characters typed
			matchee = self._typeAhead_chars;
		}

		// We need to determine the currently active index, but it depends on
		// the used context: if it's in the element, we want the actual
		// selected index, if it's in the menu, just the focused one
		var selectedIndex = ( eventType !== 'focus' ? this._selectedOptionLi().data( 'index' ) : this._focusedOptionLi().data( 'index' )) || 0;
		for ( var i = 0; i < this._optionLis.length; i++ ) {
			var thisText = this._optionLis.eq( i ).text().substr( 0, matchee.length ).toLowerCase();
			if ( thisText === matchee ) {
				if ( self._typeAhead_cycling ) {
					if ( nextIndex === null )
						nextIndex = i;
					if ( i > selectedIndex ) {
						nextIndex = i;
						break;
					}
				} else {
					nextIndex = i;
				}
			}
		}

		if ( nextIndex !== null ) {
			// Why using trigger() instead of a direct method to select the index? Because we don't what is the exact action to do,
			// it depends if the user is typing on the element or on the popped up menu
			this._optionLis.eq( nextIndex ).find( "a" ).trigger( eventType );
		}

		self._typeAhead_timer = window.setTimeout( function() {
			self._typeAhead_timer = undefined;
			self._typeAhead_chars = undefined;
			self._typeAhead_cycling = undefined;
		}, self.options.typeAhead );
	},

	// returns some usefull information, called by callbacks only
	_uiHash: function() {
		var index = this.index();
		return {
			index: index,
			option: $( "option", this.element ).get( index ),
			value: this.element[ 0 ].value
		};
	},

	open: function( event ) {
		if ( this.newelement.attr( "aria-disabled" ) != 'true' ) {
			var self = this,
				o = this.options,
				selected = this._selectedOptionLi(),
				link = selected.find("a");

			self._closeOthers( event );
			self.newelement.addClass( 'ui-state-active' );
			self.list.attr( 'aria-hidden', false );
			self.listWrap.addClass( 'ui-selectmenu-open' );

			if ( o.style == "dropdown" ) {
				self.newelement.removeClass( 'ui-corner-all' ).addClass( 'ui-corner-top' );
			} else {
				// center overflow and avoid flickering
				this.list
					.css( "left", -5000 )
					.scrollTop( this.list.scrollTop() + selected.position().top - this.list.outerHeight() / 2 + selected.outerHeight() / 2 )
					.css( "left", "auto" );
			}

			self._refreshPosition();

			if ( link.length ) {
				link[ 0 ].focus();
			}

			self.isOpen = true;
			self._trigger( "open", event, self._uiHash() );
		}
	},

	close: function( event, retainFocus ) {
		if ( this.newelement.is( '.ui-state-active') ) {
			this.newelement.removeClass( 'ui-state-active' );
			this.listWrap.removeClass( 'ui-selectmenu-open' );
			this.list.attr( 'aria-hidden', true );
			if ( this.options.style == "dropdown" ) {
				this.newelement.removeClass( 'ui-corner-top' ).addClass( 'ui-corner-all' );
			}
			if ( retainFocus ) {
				this.newelement.focus();
			}
			this.isOpen = false;
			this._trigger( "close", event, this._uiHash() );
		}
	},

	change: function( event ) {
		this.element.trigger( "change" );
		this._trigger( "change", event, this._uiHash() );
	},

	select: function( event ) {
		if ( this._disabled( event.currentTarget ) ) { return false; }
		this._trigger( "select", event, this._uiHash() );
	},

	widget: function() {
		return this.listWrap.add( this.newelementWrap );
	},

	_closeOthers: function( event ) {
		$( '.ui-selectmenu.ui-state-active' ).not( this.newelement ).each( function() {
			$( this ).data( 'selectelement' ).selectmenu( 'close', event );
		});
		$( '.ui-selectmenu.ui-state-hover' ).trigger( 'mouseout' );
	},

	_toggle: function( event, retainFocus ) {
		if ( this.isOpen ) {
			this.close( event, retainFocus );
		} else {
			this.open( event );
		}
	},

	_formatText: function( text, opt ) {
		if ( this.options.format ) {
			text = this.options.format( text, opt );
		} else if ( this.options.escapeHtml ) {
			text = $( '<div />' ).text( text ).html();
		}
		return text;
	},

	_selectedIndex: function() {
		return this.element[ 0 ].selectedIndex;
	},

	_selectedOptionLi: function() {
		return this._optionLis.eq( this._selectedIndex() );
	},

	_focusedOptionLi: function() {
		return this.list.find( '.ui-selectmenu-item-focus' );
	},

	_moveSelection: function( amt, recIndex ) {
		// do nothing if disabled
		if ( !this.options.disabled ) {
			var currIndex = parseInt( this._selectedOptionLi().data( 'index' ) || 0, 10 );
			var newIndex = currIndex + amt;
			// do not loop when using up key
			if ( newIndex < 0 ) {
				newIndex = 0;
			}
			if ( newIndex > this._optionLis.size() - 1 ) {
				newIndex = this._optionLis.size() - 1;
			}
			// Occurs when a full loop has been made
			if ( newIndex === recIndex ) {
				return false;
			}

			if ( this._optionLis.eq( newIndex ).hasClass( 'ui-state-disabled' ) ) {
				// if option at newIndex is disabled, call _moveFocus, incrementing amt by one
				( amt > 0 ) ? ++amt : --amt;
				this._moveSelection( amt, newIndex );
			} else {
				this._optionLis.eq( newIndex ).trigger( 'mouseover' ).trigger( 'mouseup' );
			}
		}
	},

	_moveFocus: function( amt, recIndex ) {
		if ( !isNaN( amt ) ) {
			var currIndex = parseInt( this._focusedOptionLi().data( 'index' ) || 0, 10 );
			var newIndex = currIndex + amt;
		} else {
			var newIndex = parseInt( this._optionLis.filter( amt ).data( 'index' ), 10 );
		}

		if ( newIndex < 0 ) {
			newIndex = 0;
		}
		if ( newIndex > this._optionLis.size() - 1 ) {
			newIndex = this._optionLis.size() - 1;
		}

		//Occurs when a full loop has been made
		if ( newIndex === recIndex ) {
			return false;
		}

		var activeID = 'ui-selectmenu-item-' + Math.round( Math.random() * 1000 );

		this._focusedOptionLi().find( 'a:eq(0)' ).attr( 'id', '' );

		if ( this._optionLis.eq( newIndex ).hasClass( 'ui-state-disabled' ) ) {
			// if option at newIndex is disabled, call _moveFocus, incrementing amt by one
			( amt > 0 ) ? ++amt : --amt;
			this._moveFocus( amt, newIndex );
		} else {
			this._optionLis.eq( newIndex ).find( 'a:eq(0)' ).attr( 'id',activeID ).focus();
		}

		this.list.attr( 'aria-activedescendant', activeID );
	},

	_scrollPage: function( direction ) {
		var numPerPage = Math.floor( this.list.outerHeight() / this._optionLis.first().outerHeight() );
		numPerPage = ( direction == 'up' ? -numPerPage : numPerPage );
		this._moveFocus( numPerPage );
	},

	_setOption: function( key, value ) {
		this.options[ key ] = value;
		// set
		if ( key == 'disabled' ) {
			if ( value ) this.close();
			this.element
				.add( this.newelement )
				.add( this.list )[ value ? 'addClass' : 'removeClass' ]( 'ui-selectmenu-disabled ' + 'ui-state-disabled' )
				.attr( "aria-disabled" , value );
		}
	},

	disable: function( index, type ){
			// if options is not provided, call the parents disable function
			if ( typeof( index ) == 'undefined' ) {
				this._setOption( 'disabled', true );
			} else {
				if ( type == "optgroup" ) {
					this._toggleOptgroup( index, false );
				} else {
					this._toggleOption( index, false );
				}
			}
	},

	enable: function( index, type ) {
			// if options is not provided, call the parents enable function
			if ( typeof( index ) == 'undefined' ) {
				this._setOption( 'disabled', false );
			} else {
				if ( type == "optgroup" ) {
					this._toggleOptgroup( index, true );
				} else {
					this._toggleOption( index, true );
				}
			}
	},

	_disabled: function( elem ) {
			return $( elem ).hasClass( 'ui-state-disabled' );
	},

	_toggleOption: function( index, flag ) {
		var optionElem = this._optionLis.eq( index );
		if ( optionElem ) {
				optionElem
					.toggleClass( 'ui-state-disabled', flag )
					.find( "a" ).attr( "aria-disabled", !flag );
			if ( flag ) {
				this.element.find( "option" ).eq( index ).attr( "disabled", "disabled" );
			} else {
				this.element.find( "option" ).eq( index ).removeAttr( "disabled" );
			}
		}
	},

	// true = enabled, false = disabled
	_toggleOptgroup: function( index, flag ) {
			var optGroupElem = this.list.find( 'li.ui-selectmenu-group-' + index );
			if ( optGroupElem ) {
				optGroupElem
					.toggleClass( 'ui-state-disabled', flag )
					.attr( "aria-disabled", !flag );
				if ( flag ) {
					this.element.find( "optgroup" ).eq( index ).attr( "disabled", "disabled" );
				} else {
					this.element.find( "optgroup" ).eq( index ).removeAttr( "disabled" );
				}
			}
	},

	index: function( newIndex ) {
		if ( arguments.length ) {
			if ( !this._disabled( $( this._optionLis[ newIndex ] ) ) && newIndex != this._selectedIndex() ) {
				this.element[ 0 ].selectedIndex = newIndex;
				this._refreshValue();
				this.change();
			} else {
				return false;
			}
		} else {
			return this._selectedIndex();
		}
	},

	value: function( newValue ) {
		if ( arguments.length && newValue != this.element[ 0 ].value ) {
			this.element[ 0 ].value = newValue;
			this._refreshValue();
			this.change();
		} else {
			return this.element[ 0 ].value;
		}
	},

	_refreshValue: function() {
		var activeClass = ( this.options.style == "popup" ) ? " ui-state-active" : "";
		var activeID = 'ui-selectmenu-item-' + Math.round( Math.random() * 1000 );
		// deselect previous
		this.list
			.find( '.ui-selectmenu-item-selected' )
			.removeClass( "ui-selectmenu-item-selected" + activeClass )
			.find('a')
			.attr( 'aria-selected', 'false' )
			.attr( 'id', '' );
		// select new
		this._selectedOptionLi()
			.addClass( "ui-selectmenu-item-selected" + activeClass )
			.find( 'a' )
			.attr( 'aria-selected', 'true' )
			.attr( 'id', activeID );

		// toggle any class brought in from option
		var currentOptionClasses = ( this.newelement.data( 'optionClasses' ) ? this.newelement.data( 'optionClasses' ) : "" );
		var newOptionClasses = ( this._selectedOptionLi().data( 'optionClasses' ) ? this._selectedOptionLi().data( 'optionClasses' ) : "" );
		this.newelement
			.removeClass( currentOptionClasses )
			.data( 'optionClasses', newOptionClasses )
			.addClass( newOptionClasses )
			.find( '.ui-selectmenu-status' )
			.html( this._selectedOptionLi().find( 'a:eq(0)' ).html() );

		this.list.attr( 'aria-activedescendant', activeID );
	},

	_refreshPosition: function() {
		var o = this.options,
			positionDefault = {
				of: this.newelement,
				my: "left top",
				at: "left bottom",
				collision: 'flip'
			};

		// if its a pop-up we need to calculate the position of the selected li
		if ( o.style == "popup" ) {
			var selected = this._selectedOptionLi();
			positionDefault.my = "left top" + ( this.list.offset().top - selected.offset().top - ( this.newelement.outerHeight() + selected.outerHeight() ) / 2 );
			positionDefault.collision = "fit";
		}

		this.listWrap
			.removeAttr( 'style' )
			.zIndex( this.element.zIndex() + 1 )
			.position( $.extend( positionDefault, o.positionOptions ) );
	}
});

})( jQuery );