well , i'm back
i'm work with asp.net, and y have the next problem.
when i created a charts no dysplay and y delete the same line
<!DOCTYPE html PUBLIC"-//W3C//DTD XHTML 1.0 Transitional//EN" "[
www.w3.org];
and displayed , but i don know affectless my pages deleting the line
thanks for the help !!!
have i nice day