How can an html element fill out 100% of the remaining screen height, using css only?

Question

I have a header element and a content element:

#header
#content

I want the header to be of fixed height and the content to fill up all the

Answer 1

The trick to this is specifying 100% height on the html and body elements. Some browsers look to the parent elements (html, body) to calculate the height.

    
        

        
        

        
    


html, body
{
    height: 100%;
}
#Header
{
    width: 960px;
    height: 150px;
}
#Content
{
    height: 100%;
    width: 960px;
}