position fixed header in html

Question

I have a header (dynamic height) with a fixed position.

I need to place the container div right below the header. As the header height is dynamic, I can\'t use the

Answer 1

body{
  margin:0;
  padding:0 0 0 0;
}
div#header{
  position:absolute;
  top:0;
  left:0;
  width:100%;
  height:25;
}
@media screen{
 body>div#header{
   position: fixed;
 }
}
* html body{
  overflow:hidden;
} 
* html div#content{
  height:100%;
  overflow:auto;
}