Side fail on Safari 6.1

[jspaper]

sidetap will return SidetapStandard instance on Safari 6.1, maybe ios7 have the same problem.

I change the conditiion on ios5 and everything works well.
Is there any comments why ShardWorker have to support?

before

ios5 = window.SharedWorker && navigator.userAgent.match(/^((?!android).)*webkit.*$/i);

after

ios5 =  navigator.userAgent.match(/^((?!android).)*webkit.*$/i);