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