javascript - post form input to an iframe on onchange of a select -

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using html, css , js, have form containing select , submit - works great.

however, want when select's onchange triggered, option posted page, inside iframe.

meaning when option 'red' selected in 'color' dropdown, i'll able display in iframe /changed?color=red, using post.

however original form has action target can't through simple submit. should do?

use "onsubmit" on form

<script> function myfunction(){   // open iframe } </script>  <form onsubmit="myfunction()" action="...">   enter name: <input type="text">   <input type="submit"> </form>

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