" )
+ .css( "position", "absolute" )
+ .appendTo( iframe.parent() )
+ .outerWidth( iframe.outerWidth() )
+ .outerHeight( iframe.outerHeight() )
+ .offset( iframe.offset() )[ 0 ];
+ });
+ },
+
+ _unblockFrames: function() {
+ if ( this.iframeBlocks ) {
+ this.iframeBlocks.remove();
+ delete this.iframeBlocks;
+ }
+ },
+
+ _blurActiveElement: function( event ) {
+ var document = this.document[ 0 ];
+
+ // Only need to blur if the event occurred on the draggable itself, see #10527
+ if ( !this.handleElement.is( event.target ) ) {
+ return;
+ }
+
+ // support: IE9
+ // IE9 throws an "Unspecified error" accessing document.activeElement from an