img onmouseover filter or change image

1.Filter
<img src="a.jpg" onmouseover="this.style.filter='alpha(opacity=\'50\')';" onmouseout="this.style.filter='alpha(opacity=\'100\')';">

2.Change Image
function changeimg(id,imgf){
 var chid = document.getElementById(id);
 chid.src = imgf;
}
<img src="a.jpg" id="imgab" onmouseover="changeimg('imgab','b.jpg');" onmouseout="changeimg('imgab','a.jpg');">

Fedora Apache Web Server & MySql Restart

Web Server restart
=======================================
Usage: /usr/sbin/httpd [-k start|restart|graceful|graceful-stop|stop]
example:
        /usr/sbin/httpd -k stop
        /usr/sbin/httpd -k start
        /usr/sbin/httpd -k restart      

MySql Restart
=======================================       
/etc/init.d/mysqld start
/etc/init.d/mysqld stop
/etc/init.d/mysqld restart      

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