var popWin = null    
var winCount = 0 
var winName = "popWin" 
function openPopWin(winURL, winWidth, winHeight, winFeatures, winLeft, winTop){ 
  var d_winLeft = 20 
  var d_winTop = 20   
  winName = "popWin" + winCount++ 
  closePopWin()           
  if (openPopWin.arguments.length >= 4)    
    winFeatures = "," + winFeatures 
  else 
    winFeatures = "" 
  if (openPopWin.arguments.length == 6)   
    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(){     
  if (navigator.appName != "Microsoft Internet Explorer" 
      || parseInt(navigator.appVersion) >=4) 
    if(popWin != null) if(!popWin.closed) popWin.close() 
  } 
function getLocation(winWidth, winHeight, winLeft, winTop){ 
  return "" 
  } 


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 - 20 
  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 
  }