var result;

function on_close_win()
{
	result = false;
}

function open_new_win(win_href,win_w,win_h)
{
	if (result) result.close();
	left_pos = (screen.width - (1*win_w))/2;
	top_pos = (screen.height - (1*win_h))/2;
	set_scrollbars = "no";
	win_add_w = 0;
	if(left_pos<40)
	{
		left_pos = 40;
		win_w = screen.width-80;
		set_scrollbars = "yes";
	}
	tt_win_w = 1*win_w;
	if(top_pos<40)
	{
		top_pos = 20;
		win_h = screen.height-80;
		if(set_scrollbars == "no") tt_win_w += 18;
		set_scrollbars = "yes";
	}
	result = open(win_href, "displayWindow","width="+tt_win_w+",height="+win_h+",left="+left_pos+",top="+top_pos+",resizable=no,status=no,toolbar=no,menubar=no,scrollbars="+set_scrollbars);
	result.focus();
}