In my dropdownlist I have two different values for each option. How can I retrieve both? Let me illustrate what I mean.
If you're using PHP to populate the text for the then you can probably just look the value up on the server. Perhaps you just need to use the $value_id to look up the text in a database table?
If not, you could include a hidden field on your form and use JavaScript to update that hidden field with the text every time a new value is selected.