var popWin = null   
var winCount = 0
var winName = "filoliXeroxPARC"
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)
{
    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
}