Suddenly the inline javascript for the calendar in the header was inserted before the mootols-script.
I now get : TypeError: window.addEvent is not a function

This happens only on the booking object-view and not in other pages on the site.

How can i fix this?

Hello,

Do you use jQuery on your website? Maybe you have conflict between mootools and jQuery.
How to resolve MooTools x JQuery conflict?

I use jQuery but it's not any problem on other pages. Only the page that show the object and where you choose day/hour. On that page the inline javascript generated by the booking-script in header comes before all other javascrips-files.

Ok, can you post url to your website here? But I don't think that this will be problem.
Object detail is first page where you can have problem with mootools vs jQuery. If jQuery is not in non-conflict mode, then it will never work.

I have opened up the bookingpage. It usually for logged in users.

beta.nhhs.no/student/rombooking/objects/3-moterom

Ok, so I checked it and I still think that it is problem of conflict:

1. mootools is loaded before jQuery (jQuery have to be loaded first and modified to non-conflict mode)
2. window.addEvent('domready', function() { is mootools function which doesn't work because of conflict.
This row only say to mootools 'wait until document will be ready and then continue in script'. This is mootools functionality and without it booking can't work.