Why does my javascript calendar widget not work in IE7?

I have a contact form with a calendar widget that pops up when the user clicks in a specifically classed input field. It works in IE8, Chrome, Firefox, but not in IE7. However, it doesn't throw up any errors, so I don't know where to begin debugging.

Site: http://www.exclusivevillas.co.za/contact-us/

Other (possibly relevant) information:

• Site runs on WordPress
• Contact Form is generated by Contact Form 7 plugin
• Valid XHTML Valid CSS3 (but ignore the ugly styling in IE开发者_StackOverflow中文版 8 -- that's another query in DocType: doctype.com/wont-table-style-nicely-ie)

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Not sure if you found a fix yet but if not, check out a recent post I wrote which outlines how to resolve the issue for ie.Link to post on ie Contact form 7 calendar bug

Hope this assists, let me know if it works for your issue.

Cheers

Ric