var popWin = null    // use this when referring to pop-up window
var winCount = 0
var winName = "popWin"

//
// jump -= Ouvre un popup
//

function jump(winURL, winWidth, winHeight, winFeatures, winLeft, winTop)
{
  var d_winLeft = 100  // default, pixels from screen left to window left
  var d_winTop =  100   // default, pixels from screen top to window top
  winName = "popWin" + winCount++ //unique name foreach pop-up window
  closePopWin()           // close any previously opened pop-up window
  if (jump.arguments.length >= 4)  // any additional features?
    winFeatures = "," + winFeatures
  else
    winFeatures = ""
  if (jump.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)
}

//
// jumpnew -= Ouvre un nouveau popup
//

function jumpNew(winURL, winWidth, winHeight, winFeatures, winLeft, winTop)
{
  var d_winLeft = 100+winCount*5  // default, pixels from screen left to window left
  var d_winTop =  100+winCount*5  // default, pixels from screen top to window top
  winName = "popWin" + winCount++ //unique name foreach pop-up window
  if (jumpNew.arguments.length >= 4)  // any additional features?
    winFeatures = "," + winFeatures
  else
    winFeatures = ""
  if (jumpNew.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)
}

//
// closepopwin -= ferme un popup existant
//

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()
}

//
// getLocation -= récupère la position et la taille de cette fenêtre
//

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
}