I am glad to use your validation tool, i think its great.
i keep getting this error which i cant understand:

Line 15, column 58: general entity "page" not defined and no default entity

window.location.href='delitem.php? itemid=' + id + '&page=0&sort=&order=';

This is usually a cascading error caused by a an undefined entity reference or use of an unencoded ampersand (&) in an URL or body text. See the previous message for

I think this is bug, because the http get variables use the ampersand and should be written that way.
I'll appreciate your reply,