function ouvrirgalerie(url) {
	var gauche = (screen.width-545)/2-15;
	var haut = 130;
	var optionsPopup = 'height=500,width=545,left='+gauche+',top='+haut;
	newwindow=window.open(url,'name',optionsPopup);
	if (window.focus) {
		newwindow.focus()
	}
	return false;
}