How to properly set the 100% DIV height to match document/window height?

Question

I have a wrapper positioned to center with an y-repeated background image:

    

        ...some content
    
&         


        

Answer 1

You could make it absolute and put zeros to top and bottom that is:

#fullHeightDiv {
    position: absolute;
    top: 0;
    bottom: 0;
}