var pop_win;
function disp(url,w,h,n){
	if(!pop_win || pop_win.closed){
	}else{
		pop_win.close();
	}
		pop_win = window.open(url, n, "width=" + w + ",height=" + h + ",menubar=yes,location=yes,status=yes,toolbar=yes,scrollbars=yes");
		pop_win.focus(); 
}