function CL_popupCentree(theURL,winName,largeur,hauteur){
	if (typeof(fe)=='undefined') fe=null;
	if (fe == null || fe.closed){
		var top=Math.round((screen.height-hauteur)/2);
		var left=Math.round((screen.width-largeur)/2);
		var options = 'width=' + largeur;
				options += ',height=' + hauteur;
				options += ',top=' +top;
				options += ',left=' +left;
				options += ',status=no,menubar=no,scrollbars=no,resizable=no';
		fe=window.open(theURL,winName,options);
	}else{
		fe.focus();
	}
}