djonA,
<!DOCTYPE HTML>
<html>
<head>
<title>Untitled</title>
</head>
<body>
<input type="text" value="">
<input type="text" value="">
<select>
<option value="0">0</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<select>
<option value="0">0</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<script>
for (var a = document.querySelectorAll("select"), b = document.querySelectorAll("input"), c = 0; c < a.length; c++)
a[c].addEventListener("change", function (d) {
return function () {
b[d].value = this.value
}
}(c), !1);
</script>
</body>
</html>