EDIT

function popupExternalLinks( x_url)

{

	var		oWindow = null;

	var		iWidth = 820;

	var		iHeight = 700;

	oWindow = window.open( x_url, "POPUP_EXTERNAL_LINKS", "dependent=yes,locationbar=no,menubar=no,scrollbars=yes,resizable=yes,status=no,screenX=0,screenY=0,height="+iHeight+",width="+iWidth); 

	if( top.window.opener)

	oWindow.opener = top.window.opener;

	oWindow.focus();

}