Ticket #4977: jsonSupport.patch

src/support.js

@@ -46 +46 @@
                 // (IE uses styleFloat instead of cssFloat)
                 cssFloat: !!a.style.cssFloat,
 
+                // Check to see if we have a native JSON parser
+                json: typeof JSON === "object" && JSON.parse,
+
                 // Will be defined later
                 scriptEval: false,
                 noCloneEvent: true,