select onchange
HTML
<select name="kitchen_color" id="kitchen_color" onchange="setImage(this);">
<option value="https://www.google.ru/images/srpr/logo4w.png">Google</option>
<option value="http://yandex.st/www/1.645/yaru/i/logo.png">Yandex</option>
<option value="http://limg.imgsmail.ru/s/images/logo/logo.v2.png">Mail</option>
</select><br />
<img src="" name="image-swap" />
JavaScript
function setImage(select){
var image = document.getElementsByName("image-swap")[0];
image.src = select.options[select.selectedIndex].value;
}