Thank's for the link.
I use Fedora 12 but that is not a problem. I have installed and configured monit to do what i need.
I saw that there might be a but with monit.
It does not do a killall -9 httpd or /etc/init.d/httpd stop . Instead of that it kill's the pid of the httpd.
At a service httpd status or /etc/init.d/httpd status it show's httpd is stopped but at a ps aux | grep httpd you can see the httpd processes started and the webserver / web sites is/are accessible.
For the moment i am leaving it as it is to see how it work's. I have stopped the cron job (i had one to restart httpd from time to time to avoid past problems).
Thank's again for your answers.