Merge "Add gzdecode fallback to GlobalFunctions"

[lhc/web/wiklou.git] / resources / jquery / jquery.tabIndex.js

diff --git a/resources/jquery/jquery.tabIndex.js b/resources/jquery/jquery.tabIndex.js
index 3bce092..cdae0ba 100644 (file)
--- a/resources/jquery/jquery.tabIndex.js
+++ b/resources/jquery/jquery.tabIndex.js
@@ -1,30 +1,52 @@
 /**
- * Finds the lowerst tabindex in use within a selection
- * 
- * @return Integer of lowest tabindex on the page
+ * jQuery tabIndex
  */
-jQuery.fn.firstTabIndex = function() {
-       var minTabIndex = 0;
-       $(this).find( '[tabindex]' ).each( function() {
-               var tabIndex = parseInt( $(this).attr( 'tabindex' ) );
-               if ( tabIndex > minTabIndex ) {
-                       minTabIndex = tabIndex;
-               }
-       } );
-       return minTabIndex;
-};
-/**
- * Finds the highest tabindex in use within a selection
- * 
- * @return Integer of highest tabindex on the page
- */
-jQuery.fn.lastTabIndex = function() {
-       var maxTabIndex = 0;
-       $(this).find( '[tabindex]' ).each( function() {
-               var tabIndex = parseInt( $(this).attr( 'tabindex' ) );
-               if ( tabIndex > maxTabIndex ) {
-                       maxTabIndex = tabIndex;
-               }
-       } );
-       return maxTabIndex;
-};
\ No newline at end of file
+( function ( $ ) {
+
+       /**
+        * Finds the lowerst tabindex in use within a selection
+        *
+        * @return number Lowest tabindex on the page
+        */
+       $.fn.firstTabIndex = function () {
+               var minTabIndex = null;
+               $(this).find( '[tabindex]' ).each( function () {
+                       var tabIndex = parseInt( $(this).prop( 'tabindex' ), 10 );
+                       // In IE6/IE7 the above jQuery selector returns all elements,
+                       // becuase it has a default value for tabIndex in IE6/IE7 of 0
+                       // (rather than null/undefined). Therefore check "> 0" as well.
+                       // Under IE7 under Windows NT 5.2 is also capable of returning NaN.
+                       if ( tabIndex > 0 && !isNaN( tabIndex ) ) {
+                               // Initial value
+                               if ( minTabIndex === null ) {
+                                       minTabIndex = tabIndex;
+                               } else if ( tabIndex < minTabIndex ) {
+                                       minTabIndex = tabIndex;
+                               }
+                       }
+               } );
+               return minTabIndex;
+       };
+
+       /**
+        * Finds the highest tabindex in use within a selection
+        *
+        * @return number Highest tabindex on the page
+        */
+       $.fn.lastTabIndex = function () {
+               var maxTabIndex = null;
+               $(this).find( '[tabindex]' ).each( function () {
+                       var tabIndex = parseInt( $(this).prop( 'tabindex' ), 10 );
+                       if ( tabIndex > 0 && !isNaN( tabIndex ) ) {
+                               // Initial value
+                               if ( maxTabIndex === null ) {
+                                       maxTabIndex = tabIndex;
+                               } else if ( tabIndex > maxTabIndex ) {
+                                       maxTabIndex = tabIndex;
+                               }
+                       }
+               } );
+               return maxTabIndex;
+       };
+
+}( jQuery ) );