JQuery :: Check Option And Change Input Values?

I would like to do something that:
Choose option:
To the option dates are assigned:

1 = from
09.10.2010
to 10
.10.2010

2 = from
09.11.2010
to 10
.12.2010

3 = from 24
.05.2010
to 29
.07.2010

And I want after choosing some option dates to change into the inputvalue.
1 2 3
From: do:
<!--

<select id="rate">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>

From: <input type="text"id="from"value="03.10.2010" size="12" />
do: <input type="text" id="to"value="09.10.2010"size="11" />
<input type="submit" />
-->
I tried to do it with function ".val();" but value are keeping steady. It can be done any other jQuery function?