#header
{
  white-space:nowrap;
  border-bottom: 4px solid green;
} 

IMG.left {margin: 10px 10px 10px 0;}
IMG.right {margin: 10px 0 10px 10px;}

P.left   {text-align:left;}
P.right  {text-align:right;}
P.center {text-align:center;}