Ticket #36267: 36267.2.patch

src/wp-includes/js/thickbox/thickbox.css

@@ -145 +145 @@
 #TB_closeWindowButton:focus .tb-close-icon {
         color: #00a0d2;
 }
+
+#TB_closeWindowButton:focus .tb-close-icon {
+        -webkit-box-shadow:
+                0 0 0 1px #5b9dd9,
+                0 0 2px 1px rgba(30, 140, 190, .8);
+        box-shadow:
+                0 0 0 1px #5b9dd9,
+                0 0 2px 1px rgba(30, 140, 190, .8);
+}

src/wp-includes/js/thickbox/thickbox.js

@@ -212 +212 @@
                         }else{// not an iframe, ajax
                                         if(jQuery("#TB_window").css("visibility") != "visible"){
                                                 if(params['modal'] != "true"){//ajax no modal
-                                                jQuery("#TB_window").append("<div id='TB_title'><div id='TB_ajaxWindowTitle'>"+caption+"</div><div id='TB_closeAjaxWindow'><a href='#' id='TB_closeWindowButton'><div class='tb-close-icon'></div></a></div></div><div id='TB_ajaxContent' style='width:"+ajaxContentW+"px;height:"+ajaxContentH+"px'></div>");
+                                                jQuery("#TB_window").append("<div id='TB_title'><div id='TB_ajaxWindowTitle'>"+caption+"</div><div id='TB_closeAjaxWindow'><button type='button' id='TB_closeWindowButton'><span class='screen-reader-text'>"+thickboxL10n.close+"</span><span class='tb-close-icon'></span></button></div></div><div id='TB_ajaxContent' style='width:"+ajaxContentW+"px;height:"+ajaxContentH+"px'></div>");
                                                 }else{//ajax modal
                                                 jQuery("#TB_overlay").unbind();
                                                 jQuery("#TB_window").append("<div id='TB_ajaxContent' class='TB_modal' style='width:"+ajaxContentW+"px;height:"+ajaxContentH+"px;'></div>");