How to spawn a session in new window using expectk

HI,
im using expectk to ssh a session, but it spawns it on the terminal on which script is run.
i want to spawn a session in new window every time i do a ssh.
Any idea ould be helpful.

my code:
#!/usr/bin/expectk

proc getfiles {host} {
log_user 0
set id [spawn ssh $host]
expect "Password: "
exp_send "abcd\n"
expect "# "
interact
}

set hostname "computer name"
entry .host -textvariable hostname

button .do -text go -command {
getfiles $hostname
}

pack .host .do

Chets