var myWindow=null;

window.onload=function()
{
 closeAll();
}

// fermer une éventuelle fenetre pop
function closeAll()
{
	if (myWindow) { if (!myWindow.closed) { myWindow.close(); }}
}
// ouvrir une fenetre pop (type 1)
function show(myURL, myWidth, myHeight)
{
	myWidth = myWidth + 40;
	myHeight = myHeight + 40;
	var myTop = 50;
	var myLeft = 200;
	closeAll();
	myWindow=window.open(myURL,"popUp","menubar=no,status=no,height="+myHeight+",width="+myWidth+",resizable=no,scrollbars=yes,alwaysRaised,top="+myTop+",left="+myLeft);
}