function OuvrirPopup() {
	var w;
       w=window.open("popup.html","titre popup","width=250,height=80");
    }
    function FermerPopup() {
       if (w.document) { w.close(); }
    }
	function popupCentre(txtPage, nbLargeur, nbHauteur, txtOption) {
	var nbTop=(screen.height-nbHauteur)/2;
	var nbLeft=(screen.width-nbLargeur)/2;
	var winPopup=window.open(txtPage,"","top=300,left=170,width="+nbLargeur+",height="+nbHauteur+","+txtOption);
	winPopup.blur();
}