var NewWindow = null;

    function CloseWin()
      {
      if (NewWindow != null)
        {
        if(!NewWindow.closed)
          NewWindow.close();
	}
      }

    function PopUpWin(url, name, size, type, width, height, posx, posy)
      {
      CloseWin();
      if (size == "full_screen")
        {
	width = screen.availWidth-8;
	height = screen.availHeight-142;
        posx = 0;
        posy = 0;
	}
      var tools = "";
      if (type == "menus")
        tools = "resizable,toolbar=yes,location=yes,menubar=yes,scrollbars=yes,width="+width+",height="+height+",left="+posx+",top="+posy+"";
      if (type == "clear")
	tools = "resizable,toolbar=no,location=no,menubar=no,scrollbars=yes,width="+width+",height="+height+",left="+posx+",top="+posy+"";
      NewWindow = window.open(url, name, tools);
      NewWindow.focus();
      }