var win_help = null;
function open_help(session){
	var url = "adminarea.php?" + session + "&mode=help_win";
	if(win_help != null){
		win_help.close();	
	}
	win_help = window.open(url, "Hilfe", "top=10,left=10width=980,height=512,scrollbars=1");
}