Forgot to say
The datepicker isn't working fine.
The datepicker is a
Also, the auto-refresh is annoying; does it have a purpose that benefits your visitor? As it is, I can be in the middle of trying to use the datepicker, and the page refreshes; bad idea.
Do validate and correct your markup, you do have errors.
Thanks for your answer.
The idea of the page refresh is:
When someone else is booking at the same time, then the clickable markers are removed.
My client can deside if he wants the page to be refrehsed, and with which interval.
I am dutch, sorry for my English
If it were me, I wouldn't
If it were me, I wouldn't even allow the client to consider auto-refresh on an interactive page. It's just too user-unfriendly. Save it for informational pages where the data are dynamic; to update baseball scores, for example.
If you can't get support from the author on your calendar, try a different script. I notice there are a bunch of available scripts with very liberal licensing. See Google.