prototype: Temporary workaround for Prototype.BrowserFeatures.SpecificElementExtensions incorrectly evaluating to true on iPhone.

CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Temporary workaround for Prototype.BrowserFeatures.SpecificElementExtensions incorrectly evaluating to true on iPhone. (needs further investigation)  [sam]
+
 * The action for Form#request defaults to the current URL if the "action" attribute is empty. (This is what most of the major browsers do.) Fixes #8483. [Tomas, Mislav Marohnić]
 
 * In form serialization, change the way submit buttons are handled. Previously all submit buttons were serialized; now Prototype serializes only the first one. Change Form#serialize and Form.serializeElements to accept a params hash. With the "hash: false" option, a serialized string is returned instead of the hash data object. With the "submit: 'foo'" option, only the submit button with the name "foo" is serialized.  References #5031.  [Mislav Marohnić]

src/prototype.js

@@ -14,6 +14,7 @@ var Prototype = {
     XPath: !!document.evaluate,
     ElementExtensions: !!window.HTMLElement,
     SpecificElementExtensions: 
+      navigator.userAgent.indexOf('iPhone') == -1 &&
       (document.createElement('div').__proto__ !== 
        document.createElement('form').__proto__)
   },