Support of preview for pdf with several pages

htdocs/adherents/agenda.php

htdocs/adherents/document.php

htdocs/comm/action/document.php

htdocs/comm/propal/document.php

htdocs/commande/document.php

htdocs/compta/bank/releve.php

htdocs/compta/bank/various_payment/document.php

htdocs/compta/deplacement/document.php

htdocs/compta/facture/card.php

htdocs/compta/facture/document.php

htdocs/compta/facture/fiche-rec.php

htdocs/compta/salaries/document.php

htdocs/compta/sociales/document.php

htdocs/contact/document.php

htdocs/contrat/class/contrat.class.php

htdocs/contrat/document.php

htdocs/core/ajax/ajaxdirpreview.php

htdocs/core/class/html.formfile.class.php

htdocs/core/lib/agenda.lib.php

htdocs/core/lib/bank.lib.php