Ticket #6015: tabindex_bug.patch

_source/core/dom/element.js

@@ -527 +527 @@
                                 {
                                         var tabIndex = this.$.tabIndex;
 
+                    // WebKit (as of r63640) returns 0 for tabIndex of
+                    // fieldset and legend elements, despite these elements not
+                    // being focusable. As with the undefined case, get it from
+                    // the attribute instead.
+                    // https://bugs.webkit.org/show_bug.cgi?id=42765
+
                                         // Safari returns "undefined" for elements that should not
                                         // have tabindex (like a div). So, we must try to get it
                                         // from the attribute.
                                         // https://bugs.webkit.org/show_bug.cgi?id=20596
-                                        if ( tabIndex == undefined )
+                                        if ( (tabIndex == undefined) ||
+                         (this.$.nodeName === 'FIELDSET') ||
+                         (this.$.nodeName === 'LEGEND') )
                                         {
                                                 tabIndex = parseInt( this.getAttribute( 'tabindex' ), 10 );