function Login(){
var done=0;
var username=document.login.username.value;
username=username.toLowerCase();
var password=document.login.password.value;
password=password.toLowerCase();
if (username=="tarif" && password=="utilisateur") { window.location="tarifs/tu_270410.pdf"; done=1; }
if (username=="tarif2" && password=="confidentiel") { window.location="tarifs/tc_270410.pdf"; done=1; }
if (username=="négoce" && password=="bois532613") { window.location="tarifs/tn_160909.pdf"; done=1; }
if (username=="tpres" && password=="archi") { window.location="tarifs/tp_270410.pdf"; done=1; }
if (username=="tindus" && password=="tend259812") { window.location="tarifs/ti_160909.pdf"; done=1; }
if (done==0) { alert("Identifiants invalides"); }
}