//===========================================================================================
//
//===========================================================================================

var popWin      = null;
var win_width   = 320;
var win_height  = 200;
var winpos_left = 200;
var winpos_top  = 200;

//===========================================================================================
//
//===========================================================================================

function open_window(url)
{
  popWin = window.open(url,"","scrollbars=no,menubar=no,width="+win_width+",height="+win_height+
                              ",resizable=no,toolbar=no,location=no,status=no,left="+winpos_left+
                              ",top="+winpos_top);
}

//===========================================================================================
// close pop-up window if it is open
//===========================================================================================

function close_window()
{
  if(popWin != null && !popWin.closed)
  {
    popWin.close();
    popWin = null;
  }
}