//******************************************************************************
function copyright(){
     document.write("Copyright ©1999 - 2008 Cynthia Wu All rights reserved.");
}

//******************************************************************************

var popWin = null    // use this when referring to pop-up window
var winCount = 0
var winName = "popWin"
function openPopWin(winURL, winWidth, winHeight, winFeatures, winLeft, winTop){
  var d_winLeft = 15  // default, pixels from screen left to window left
  var d_winTop = 15   // default, pixels from screen top to window top
  winWidth=winWidth+20
  winHeight=winHeight+30
  winName = "popWin" + winCount++ //unique name for each pop-up window
  closePopWin()           // close any previously opened pop-up window
  if (openPopWin.arguments.length >= 4)  // any additional features? 
    winFeatures = "," + winFeatures
  else 
    winFeatures = "" 
  if (openPopWin.arguments.length == 6)  // location specified
    winFeatures += getLocation(winWidth, winHeight, winLeft, winTop)
  else
    winFeatures += getLocation(winWidth, winHeight, d_winLeft, d_winTop)
    popWin = window.open(winURL, winName, "width=" + winWidth 
           + ",height=" + winHeight + winFeatures)
  }


function closePopWin(){    // close pop-up window if it is open 
  if (navigator.appName != "Microsoft Internet Explorer" 
      || parseInt(navigator.appVersion) >=4) //do not close if early IE
    if(popWin != null) if(!popWin.closed) popWin.close() 
  }
  

function getLocation(winWidth, winHeight, winLeft, winTop){
  var winLocation = ""
  if (winLeft < 0)
    winLeft = screen.width - winWidth + winLeft
  if (winTop < 0)
    winTop = screen.height - winHeight + winTop
	if (winTop == "cen")
    winTop = (screen.height - winHeight)/2
  if (winLeft == "cen")
    winLeft = (screen.width - winWidth)/2
  if (winLeft>0 && winTop>0)
      winLocation =  ",screenX=" + winLeft + ",left=" + winLeft	+ ",screenY=" + winTop + ",top=" + winTop
  else
    winLocation = ""
  return winLocation
  }