function affichemaxi(chemin,popup_height,popup_width,titre)
{
var html = ''+titre+'
';
popupImage = window.open('','_blank','toolbar=0,location=0,directories=0,menuBar=0,scrollbars=0,resizable=1,height='+popup_height+',width='+popup_width );
popupImage.document.open();
popupImage.document.write(html);
popupImage.document.close()
}