
I don't know how familiar you are with the "W3C Validator", but if you're not, go to this site and put in your page URL: http://validator.w3.org/
Correcting some of these errors can be quite an educational experience!
You will see a number of errors associated with the <object> and <embed> tags used for placement of Flash elements (your menus). This is a 'known issue' and, at least to begin with, you can probably safely disregard them and instead concentrate on the remaining errors, especially in the areas immediately before the code associated with the calendar.
If you have access to the CoffeeCup HTML Editor, you will find that the "Code Cleaner" there will automatically correct quite a few of the errors.
Please post back if you get stuck, - or to report success!!

Per
www.mingas.com
www.mingas.com