Hoping someone out there can help me with this. I'm working on a Mobile Joomla version of a website and I'm running into an issue on the iPhone with some script that is supposed to pop up a calendar for date selection. 

You can see the standard version of the module along the right side on this page (the "Reserve Today" box):
bateauxnewyork.com/ (if you click on the calendar icon, you can see the pop-up window). 

Using the exact same code, I'm trying to add this Reserve Today box to a module on the Mobile Joomla version of this site. This seems to be working on the BlackBerry and Android, but on the iPhone when you click on the calendar the pop-up window doesn't appear. Here is a link to the mobile version on staging:
www.bateauxnewyork.com.joomlatest.subscribermail.com/New-York/book-now-mobile

I'd really appreciate any insight into what might be causing this issue on the iPhone.