using Ajax in wordpress and receive this error message "NetworkError: 404 Not Found"

I am using Ajax in Wordpress and receive this error message "NetworkError: 404 Not Found". And I have no clue what is going wrong.

EDIT: This is my link: http://www.myfavouritelink.nl/?page=bookmark#

More details: via Firebug console, I could see the correct respons开发者_如何转开发e. However I still receive this error ""NetworkError: 404 Not Found - http://www.myfavouritelink.nl/wp-content/themes/arthemia/js/ajax/getBookmark.php?id=54&action=edit""

Try changing this line:

url: "/wp-content/themes/arthemia/js/ajax/getBookmark.php"

to this:

url : "bloginfo('wpurl')/wp-content/themes/arthemia/js/ajax/getBookmark.php",