function ouvrirPopup (pFichier, pLargeur, pHauteur)
{
var posX = (screen.width / 3) - (pLargeur / 2);
var posY = (screen.height / 2) - (pHauteur / 2);
window.open(pFichier,"popup","width = " + pLargeur + ", height = " + pHauteur + ", left = " + posX + ", top = " + posY + ", resizable = y , scrollbars = yes" );
}