my $string = "calendarview.pl?loginid=102138&month=04&year=2003&student_id=&user_type=TUTOR&CalendarName=102138Academic&framename=top.index_main&session_number=618280744437303";
my $i = index($string,"CalendarName=") + length("CalendarName=");
my $j = index($string, "&", $i);
substr($string,$i,$j-$i) = "";