Block level elements can be centered by:
The margin-left and margin-right properties can be set to some explicit value:
BODY {
width: 40em;
background: fluorescent;
}
P {
width: 30em;
margin-right: auto;
margin-left: auto
}
In this case, the left and right margins will be each, five ems wide since they split up the ten ems left over from (40em-30em). It was unnecessary for setting up an explicit width for the BODY element; it was done here for simplicity.
anand.johari1994