Disable save image pop-up on iPad1 and ios5 issue

[ChrisDoT]

I build a mobile website and I have a javascript game on the site that requires user to tap and hold on an image to shake and animate.I've implemented the following CSS on the image:\[code\]-webkit-user-select:none;-webkit-touch-callout:none;pointer-events:none;\[/code\]It works fine on ipad2 and ipad3 that runs on ios4 and ios6 but it doesn't work on ipad1 that runs on ios5.It's hard to believe that the CSS works on ios4 but not on ios5. I doubt this is device specific issue, but let me know if it is.Thanks!