Untitled

<div id="win1" style="position:relative;  z-index:1; left:200px; top: 100px;" onload="addWindow('win1');">
         <div class="northnorthwest"/><div class="north"/><div class="northnortheast"/><div class="northwestwest"/>


....

.northnorthwest {
	background: transparent url(images/northnorthwest.png);
         width: 16px;
         height: 8px;

}
.north {
	background: transparent url(images/north.png) repeat-x;
	height: 8px;

         width:300px;
         position:relative;
}
.northnortheast {
	background: transparent url(images/northnortheast.png);
         width: 18px;
         height: 8px;
         float:right;
         position:relative;

}