[jQuery] [autocomplete] clearing the input field if the user does not select any of the options

[jQuery] [autocomplete] clearing the input field if the user does not select any of the options


Hello,
How can I clear the input field if the user does not select any of the
options.
I have tried mustMatch but in IE it seems that the text typed must
match the options. Maybe I am not getting it right
My options are
$("#auto_dropoff_state").autocomplete(dropoff_statecity, {
    width: 250,
    matchContains: true,
    autoFill: false
});
Thanks in advance