Landing a fix for non-link anchor tabIndex (from scott.gonzalez). Fixes ticket #3916.

src/core.js

@@ -986,9 +986,11 @@ jQuery.extend({
 					var attributeNode = elem.getAttributeNode( "tabIndex" );
 					return attributeNode && attributeNode.specified
 						? attributeNode.value
-						: elem.nodeName.match(/^(a|area|button|input|object|select|textarea)$/i)
+						: elem.nodeName.match(/(button|input|object|select|textarea)/i)
 							? 0
-							: undefined;
+							: elem.nodeName.match(/^(a|area)$/i) && elem.href
+								? 0
+								: undefined;
 				}
 
 				return elem[ name ];

test/index.html

@@ -198,7 +198,7 @@ Z</textarea>
 		</div>
 		
 		<div id="tabindex-tests">
-			<ol id="listWithTabIndex" tabindex="0">
+			<ol id="listWithTabIndex" tabindex="5">
 				<li id="foodWithNegativeTabIndex" tabindex="-1">Rice</li>
 				<li id="foodNoTabIndex">Beans</li>
 				<li>Blinis</li>
@@ -209,6 +209,9 @@ Z</textarea>
 			<span>...</span><a href="#" id="linkWithNoTabIndex">Eat lots of food</a><span>...</span> |
 			<span>...</span><a href="#" id="linkWithTabIndex" tabindex="2">Eat a little food</a><span>...</span> |
 			<span>...</span><a href="#" id="linkWithNegativeTabIndex" tabindex="-1">Eat no food</a><span>...</span>
+			<span>...</span><a id="linkWithNoHrefWithNoTabIndex">Eat a burger</a><span>...</span>
+			<span>...</span><a id="linkWithNoHrefWithTabIndex" tabindex="1">Eat some funyuns</a><span>...</span>
+			<span>...</span><a id="linkWithNoHrefWithNegativeTabIndex" tabindex="-1">Eat some funyuns</a><span>...</span>
 		</div>
 	</div>
 	</dl>

test/unit/core.js

@@ -552,22 +552,21 @@ if ( !isLocal ) {
 }
 
 test("attr('tabindex')", function() {
-	expect(5);
-
-	// tabindex 0
-	equals(jQuery('#listWithTabIndex').attr('tabindex'), 0, 'tabindex of 0');
-
-	// positive tabindex
-	equals(jQuery('#linkWithTabIndex').attr('tabindex'), 2, 'tabindex of 2');
-
-	// negative tabindex
-	equals(jQuery('#linkWithNegativeTabIndex').attr('tabindex'), -1, 'negative tabindex');
-
-	// regular element without a tabindex
-	equals(jQuery('#divWithNoTabIndex').attr('tabindex'), undefined, 'no tabindex, not tabbable by default');
+	expect(8);
 
-    // link without a tabindex
-	equals(jQuery('#linkWithNoTabIndex').attr('tabindex'), 0, 'no tabindex, tabbable by default');
+	// elements not natively tabbable
+	equals(jQuery('#listWithTabIndex').attr('tabindex'), 5, 'not natively tabbable, with tabindex set to 0');
+	equals(jQuery('#divWithNoTabIndex').attr('tabindex'), undefined, 'not natively tabbable, no tabindex set');
+	
+	// anchor with href
+	equals(jQuery('#linkWithNoTabIndex').attr('tabindex'), 0, 'anchor with href, no tabindex set');
+	equals(jQuery('#linkWithTabIndex').attr('tabindex'), 2, 'anchor with href, tabindex set to 2');
+	equals(jQuery('#linkWithNegativeTabIndex').attr('tabindex'), -1, 'anchor with href, tabindex set to -1');
+
+	// anchor without href
+	equals(jQuery('#linkWithNoHrefWithNoTabIndex').attr('tabindex'), undefined, 'anchor without href, no tabindex set');
+	equals(jQuery('#linkWithNoHrefWithTabIndex').attr('tabindex'), 1, 'anchor without href, tabindex set to 2');
+	equals(jQuery('#linkWithNoHrefWithNegativeTabIndex').attr('tabindex'), -1, 'anchor without href, no tabindex set');
 });
 
 test("attr('tabindex', value)", function() {