div.headerFrame
{ 
  behavior:url(/css/border-radius.htc);
  -moz-border-radius:20px; / Firefox / 
  -webkit-border-radius:20px; / Safari and chrome / 
  -khtml-border-radius:20px; / Linux browsers / 
  border-radius:20px; / CSS3 / 
}
.stretch 
{
width:100%;
height:100%;
}