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++ //nom unique pour chaque pop-up window
	closePopWin()           	// close any previously opened pop-up window
	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()
{
	// 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 - 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
}