问想了解一下这段js代码可以在简化一些吗？

<script type="text/javascript">

var op = document.getElementById("wpas_ticket_type");

for (var i = 0; i < op.length; i++) {

if (op[i].value.toLowerCase() == "4338") {

op[i].disabled = true;

}

}

var op = document.getElementById("wpas_ticket_type");

for (var i = 0; i < op.length; i++) {

if (op[i].value.toLowerCase() == "4657") {

op[i].disabled = true;

}

}

</script>