function popup (adr,titre,l,h)
{  
window.open (adr, titre, 'height=' + h + ', width=' + l + ', menubar=no, resizable=yes, left=30, top=50, dependent=yes, status=no, toolbar=no, scrollbars=yes') ;
}

function fenetre(img,l,h)
{
//l=l+40;
//h=h+50;

window.open (img, "Dordogne-Périgord", 'height=' + h + ', width=' + l + ', menubar=no, resizable=no, left=30, top=50, dependent=yes, status=no, toolbar=no, scrollbars=no') ;
}