-webkit-touch-callout and -webkit-user-select is not working in phonegap

After reading a book to enhance a web app experience on iOS device, I tried to add "-webkit-touch-callout" and "-webkit-user-select" to the CSS of my phonegap app. However, it seems the UIWebview in phonegap is not quite similar with the UIWebview in mobile safari. Both of the CSS property is not working in my phonegap app.

-webkit-touch-callout should prevent a menu being pop up when you touch and hold a link in iOS

and

-webkit-user-select should prevent user to invoke the select text/copy/paste action

Have you tried with those CSS properties? Are they working on your app? is yours a web app or a phonegap app?