Using latest master

johnnyshields · johnnyshields · commit c8e58d69cca8 · 2013-09-05T14:36:06.000+09:00
diff --git a/app/assets/javascripts/jquery.ui.draggable.js b/app/assets/javascripts/jquery.ui.draggable.js
@@ -80,9 +80,19 @@ $.widget("ui.draggable", $.ui.mouse, {
 
 	_mouseCapture: function(event) {
 
-		var o = this.options;
-
-		// $( document.activeElement ).blur();
+		var document = this.document[ 0 ],
+			o = this.options;
+
+		// support: IE9
+		// IE9 throws an "Unspecified error" accessing document.activeElement from an <iframe>
+		try {
+			// Support: IE9+
+			// If the <body> is blurred, IE will switch windows, see #9520
+			if ( document.activeElement && document.activeElement.nodeName.toLowerCase() !== "body" ) {
+				// Blur any element that currently has focus, see #4261
+				$( document.activeElement ).blur();
+			}
+		} catch ( error ) {}
 
 		// among others, prevent a drag on a resizable-handle
 		if (this.helper || o.disabled || $(event.target).closest(".ui-resizable-handle").length > 0) {
@@ -985,4 +995,4 @@ $.ui.plugin.add("draggable", "zIndex", {
 	}
 });
 
-})(jQuery);
+})(jQuery);
