Expect-script for automating ssh-logins without keys

ssh.expect

#!/usr/bin/expect -f

set username [lrange $argv 0 0]
set host [lrange $argv 1 1]
set password [lrange $argv 2 2]
set timeout -1
spawn ssh $username@$host
expect "*?assword:*"
send -- "$password\r"
send -- "\r"
interact