if
($state==0) {
if (param('msg') eq 'Search') {
$state=1;
state1();
}
else {state0();}
}
elsif
($state==1) {
if (param('msg') eq 'Available') {
$state=2;
state2();
}
elsif (param('msg') eq 'Not
Available') {
$state=0;
state0();
}
else {
state1();
}
}
elsif
($state==2) {
if (param('msg') eq 'Deliver') {
$state=3;
state3();
}
else {state2();}
}
elsif
($state==3) {
state0();
$state=0;
}
else
{
print "</html>";
exit;
}
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