var popWin = null
var WinCount = 0
var WinName = "popWin"

function openNote(Note){
    closeWin()
    WinName = "popWin" + WinCount++ //unique name for each pop-up window
    popWin = window.open(Note, WinName,
             "toolbar=no,scrollbars=yes,resizable=no,width=600,height=300")

}

function openPage(Page){
    closeWin()
    WinName = "popWin" + WinCount++ //unique name for each pop-up window
    popWin = window.open(Page, WinName,
             "toolbar=no,scrollbars=yes,resizable=no,width=600,height=400")

}

function openPic(fileName, windowWidth, windowHeight){
  closeWin()
  WinName = "popWin" + WinCount++ //unique name for each pop-up window
  popWin = window.open(fileName, WinName,
           "toolbar=no,scrollbars=no,resizable=no,width=" 
           + windowWidth + ",height=" 
           + windowHeight) 
}

function openBigPic(fileName, windowWidth, windowHeight){
  closeWin()
  WinName = "popWin" + WinCount++ //unique name for each pop-up window
  popWin = window.open(fileName, WinName,
           "toolbar=no,scrollbars=yes,resizable=yes,width=" 
           + (parseInt(windowWidth) + 15)  + ",height=" 
           + (parseInt(windowHeight) + 15)) 
}

function closeWin(){
  if (navigator.appName != "Microsoft Internet Explorer" 
      || parseInt(navigator.appVersion) >=4) //do not close if early IE
    if(popWin != null) if(!popWin.closed) popWin.close() 
}