position:fixed and width:inherit with percentage parent

Question

I\'m trying to give a fixed element a width of a percentage parent (here #container). When I use pixel instead of the percentage then it works

Answer 1

set the width of "fixed" to 100%, and give it (let's say) a position: relative instead of fixed. http://jsfiddle.net/J7yE4/

#fixed {
    position: relative;
    width: 100%;
    border: 1px solid green;
}