Positioning a div absolutely

[JonD]

I want a div that will always been 550px from the top but be centered in the middle of the page so when the page width is altered, its still centered.

Ive tried doing
left: 50% but this starts the div at 50%, ie, the center of the div **** be where 50% is.

Thx

 

[Dj_Jestar]

div.class {
    position: absolute;
    width: 550px;
    left: 50%;
    margin-left: -225px;
}

 

[JonD]

Cool that works great.

Thx a lot.