How to change form action attribute value based on selection

I've looked at countless examples on here and not sure what I'm doing wrong. I'm trying to change the form action based on the selected value from a dropdown menu.

Basically, the HTML looks like this:

<form id="storetable" autocomplete="off" action="" method="post">
<label>STORE:label>
<input type="text" list="storeID" name="store" placeholder="Choose a store..." required>
<datalist id="storeID">
<option value="cwb_coins">Causeway Bayoption>
<option value="wc_coins">Wan Chaioption>
<option value="lck_coins">Lai Chi Kokoption>
<option value="tp_coins">Tai Pooption>
datalist>
form