CSS How to set div height 100% minus nPx

Question

I have a wrapper div which contans 2 divs next to each other. Above this container I have a div that contains my header. The wrapper div must be 100% minus the height of the

Answer 1

great one... now i have stopped using % he he he... except for the main container as shown below:

and here is the css:

#divContainer {
    width: 100%;
    height: 100%;
}
#divHeader {
    position: absolute;
    left: 0px;
    top: 0px;
    right: 0px;
    height: 28px;
}
#divContentArea {
    position: absolute;
    left: 0px;
    top: 30px;
    right: 0px;
    bottom: 30px;
}
#divContentLeft {
    position: absolute;
    top: 0px;
    left: 0px;
    width: 250px;
    bottom: 0px;
}
#divContentRight {
    position: absolute;
    top: 0px;
    left: 254px;
    right: 0px;
    bottom: 0px;
}
#divFooter {
    position: absolute;
    height: 28px;
    left: 0px;
    bottom: 0px;
    right: 0px;
}

i tested this in all known browsers and is working fine. Are there any drawbacks using this way?