docs: function( name, offsetParent, corner, offsetX, offsetY, callback ) {
  				var panel = this._.panel,
  					block = panel.showBlock( name );
  
  				this.allowBlur( false );
  
  				// Record from where the focus is when open panel.
  				var editable = this._.editor.editable();
  				this._.returnFocus = editable.hasFocus ? editable : new CKEDITOR.dom.element( CKEDITOR.document.$.activeElement );
  				this._.hideTimeout = 0;
  
  				var element = this.element,
  					iframe = this._.iframe,
  					// Non IE prefer the event into a window object.
  					focused = CKEDITOR.env.ie ? iframe : new CKEDITOR.dom.window( iframe.$.contentWindow ),
  					doc = element.getDocument(),
  					positionedAncestor = this._.parentElement.getPositionedAncestor(),
  					position = offsetParent.getDocumentPosition( doc ),
  					positionedAncestorPosition = positionedAncestor ? positionedAncestor.getDocumentPosition( doc ) : { x: 0, y: 0 },
  					rtl = this._.dir == 'rtl',
  					left = position.x + ( offsetX || 0 ) - positionedAncestorPosition.x,
  					top = position.y + ( offsetY || 0 ) - positionedAncestorPosition.y;
  
  				// Floating panels are off by (-1px, 0px) in RTL mode. (#3438)
  				if ( rtl && ( corner == 1 || corner == 4 ) )
  					left += offsetParent.$.offsetWidth;
  				else if ( !rtl && ( corner == 2 || corner == 3 ) )
  					left += offsetParent.$.offsetWidth - 1;
  
  				if ( corner == 3 || corner == 4 )
  					top += offsetParent.$.offsetHeight - 1;
  
  				// Memorize offsetParent by it's ID.
  				this._.panel._.offsetParentId = offsetParent.getId();
  
  				element.setStyles( {
  					top: top + 'px',
  					left: 0,
  					display: ''
  				} );
  
  				// Don't use display or visibility style because we need to
  				// calculate the rendering layout later and focus the element.
  				element.setOpacity( 0 );
  
  				// To allow the context menu to decrease back their width
  				element.getFirst().removeStyle( 'width' );
  
  				// Report to focus manager.
  				this._.editor.focusManager.add( focused );
  
  				// Configure the IFrame blur event. Do that only once.
  				if ( !this._.blurSet ) {
  
  					// With addEventListener compatible browsers, we must
  					// useCapture when registering the focus/blur events to
  					// guarantee they will be firing in all situations. (#3068, #3222 )
  					CKEDITOR.event.useCapture = true;
  
  					focused.on( 'blur', function( ev ) {
  						// As we are using capture to register the listener,
  						// the blur event may get fired even when focusing
  						// inside the window itself, so we must ensure the
  						// target is out of it.
  						if ( !this.allowBlur() || ev.data.getPhase() != CKEDITOR.EVENT_PHASE_AT_TARGET )
  							return;
  
  						if ( this.visible && !this._.activeChild ) {
  							// [iOS] Allow hide to be prevented if touch is bound
  							// to any parent of the iframe blur happens before touch (#10714).
  							if ( CKEDITOR.env.iOS ) {
  								if ( !this._.hideTimeout )
  									this._.hideTimeout = CKEDITOR.tools.setTimeout( doHide, 0, this );
  							} else
  								doHide.call( this );
  						}
  
  						function doHide() {
  							// Panel close is caused by user's navigating away the focus, e.g. click outside the panel.
  							// DO NOT restore focus in this case.
  							delete this._.returnFocus;
  							this.hide();
  						}
  					}, this );
  
  					focused.on( 'focus', function() {
  						this._.focused = true;
  						this.hideChild();
  						this.allowBlur( true );
  					}, this );
  
  					// [iOS] if touch is bound to any parent of the iframe blur
  					// happens twice before touchstart and before touchend (#10714).
  					if ( CKEDITOR.env.iOS ) {
  						// Prevent false hiding on blur.
  						// We don't need to return focus here because touchend will fire anyway.
  						// If user scrolls and pointer gets out of the panel area touchend will also fire.
  						focused.on( 'touchstart', function() {
  							clearTimeout( this._.hideTimeout );
  						}, this );
  
  						// Set focus back to handle blur and hide panel when needed.
  						focused.on( 'touchend', function() {
  							this._.hideTimeout = 0;
  							this.focus();
  						}, this );
  					}
  
  					CKEDITOR.event.useCapture = false;
  
  					this._.blurSet = 1;
  				}
  
  				panel.onEscape = CKEDITOR.tools.bind( function( keystroke ) {
  					if ( this.onEscape && this.onEscape( keystroke ) === false )
  						return false;
  				}, this );
  
  				CKEDITOR.tools.setTimeout( function() {
  					var panelLoad = CKEDITOR.tools.bind( function() {
  						var target = element;
  
  						// Reset panel width as the new content can be narrower
  						// than the old one. (#9355)
  						target.removeStyle( 'width' );
  
  						if ( block.autoSize ) {
  							var panelDoc = block.element.getDocument();
  							var width = ( CKEDITOR.env.webkit? block.element : panelDoc.getBody() )[ '$' ].scrollWidth;
  
  							// Account for extra height needed due to IE quirks box model bug:
  							// http://en.wikipedia.org/wiki/Internet_Explorer_box_model_bug
  							// (#3426)
  							if ( CKEDITOR.env.ie && CKEDITOR.env.quirks && width > 0 )
  								width += ( target.$.offsetWidth || 0 ) - ( target.$.clientWidth || 0 ) + 3;
  
  							// Add some extra pixels to improve the appearance.
  							width += 10;
  
  							target.setStyle( 'width', width + 'px' );
  
  							var height = block.element.$.scrollHeight;
  
  							// Account for extra height needed due to IE quirks box model bug:
  							// http://en.wikipedia.org/wiki/Internet_Explorer_box_model_bug
  							// (#3426)
  							if ( CKEDITOR.env.ie && CKEDITOR.env.quirks && height > 0 )
  								height += ( target.$.offsetHeight || 0 ) - ( target.$.clientHeight || 0 ) + 3;
  
  							target.setStyle( 'height', height + 'px' );
  
  							// Fix IE < 8 visibility.
  							panel._.currentBlock.element.setStyle( 'display', 'none' ).removeStyle( 'display' );
  						} else
  							target.removeStyle( 'height' );
  
  						// Flip panel layout horizontally in RTL with known width.
  						if ( rtl )
  							left -= element.$.offsetWidth;
  
  						// Pop the style now for measurement.
  						element.setStyle( 'left', left + 'px' );
  
  						/* panel layout smartly fit the viewport size. */
  						var panelElement = panel.element,
  							panelWindow = panelElement.getWindow(),
  							rect = element.$.getBoundingClientRect(),
  							viewportSize = panelWindow.getViewPaneSize();
  
  						// Compensation for browsers that dont support "width" and "height".
  						var rectWidth = rect.width || rect.right - rect.left,
  							rectHeight = rect.height || rect.bottom - rect.top;
  
  						// Check if default horizontal layout is impossible.
  						var spaceAfter = rtl ? rect.right : viewportSize.width - rect.left,
  							spaceBefore = rtl ? viewportSize.width - rect.right : rect.left;
  
  						if ( rtl ) {
  							if ( spaceAfter < rectWidth ) {
  								// Flip to show on right.
  								if ( spaceBefore > rectWidth )
  									left += rectWidth;
  								// Align to window left.
  								else if ( viewportSize.width > rectWidth )
  									left = left - rect.left;
  								// Align to window right, never cutting the panel at right.
  								else
  									left = left - rect.right + viewportSize.width;
  							}
  						} else if ( spaceAfter < rectWidth ) {
  							// Flip to show on left.
  							if ( spaceBefore > rectWidth )
  								left -= rectWidth;
  							// Align to window right.
  							else if ( viewportSize.width > rectWidth )
  								left = left - rect.right + viewportSize.width;
  							// Align to window left, never cutting the panel at left.
  							else
  								left = left - rect.left;
  						}
  
  
  						// Check if the default vertical layout is possible.
  						var spaceBelow = viewportSize.height - rect.top,
  							spaceAbove = rect.top;
  
  						if ( spaceBelow < rectHeight ) {
  							// Flip to show above.
  							if ( spaceAbove > rectHeight )
  								top -= rectHeight;
  							// Align to window bottom.
  							else if ( viewportSize.height > rectHeight )
  								top = top - rect.bottom + viewportSize.height;
  							// Align to top, never cutting the panel at top.
  							else
  								top = top - rect.top;
  						}
  
  						// If IE is in RTL, we have troubles with absolute
  						// position and horizontal scrolls. Here we have a
  						// series of hacks to workaround it. (#6146)
  						if ( CKEDITOR.env.ie ) {
  							var offsetParent = new CKEDITOR.dom.element( element.$.offsetParent ),
  								scrollParent = offsetParent;
  
  							// Quirks returns <body>, but standards returns <html>.
  							if ( scrollParent.getName() == 'html' )
  								scrollParent = scrollParent.getDocument().getBody();
  
  							if ( scrollParent.getComputedStyle( 'direction' ) == 'rtl' ) {
  								// For IE8, there is not much logic on this, but it works.
  								if ( CKEDITOR.env.ie8Compat )
  									left -= element.getDocument().getDocumentElement().$.scrollLeft * 2;
  								else
  									left -= ( offsetParent.$.scrollWidth - offsetParent.$.clientWidth );
  							}
  						}
  
  						// Trigger the onHide event of the previously active panel to prevent
  						// incorrect styles from being applied (#6170)
  						var innerElement = element.getFirst(),
  							activePanel;
  						if ( ( activePanel = innerElement.getCustomData( 'activePanel' ) ) )
  							activePanel.onHide && activePanel.onHide.call( this, 1 );
  						innerElement.setCustomData( 'activePanel', this );
  
  						element.setStyles( {
  							top: top + 'px',
  							left: left + 'px'
  						} );
  						element.setOpacity( 1 );
  
  						callback && callback();
  					}, this );
  
  					panel.isLoaded ? panelLoad() : panel.onLoad = panelLoad;
  
  					CKEDITOR.tools.setTimeout( function() {
  						var scrollTop = CKEDITOR.env.webkit && CKEDITOR.document.getWindow().getScrollPosition().y;
  
  						// Focus the panel frame first, so blur gets fired.
  						this.focus();
  
  						// Focus the block now.
  						block.element.focus();
  
  						// #10623, #10951 - restore the viewport's scroll position after focusing list element.
  						if ( CKEDITOR.env.webkit )
  							CKEDITOR.document.getBody().$.scrollTop = scrollTop;
  
  						// We need this get fired manually because of unfired focus() function.
  						this.allowBlur( true );
  						this._.editor.fire( 'panelShow', this );
  					}, 0, this );
  				}, CKEDITOR.env.air ? 200 : 0, this );
  				this.visible = 1;
  
  				if ( this.onShow )
  					this.onShow.call( this );
  			}