html select option change other select option
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<select id="type">
<option value="item0">--Select an Item--</option>
<option value="item1">item1</option>
<option value="item2">item2</option>
<option value="item3">item3</option>
</select>
<select id="size">
<option value="">-- select one -- </option>
</select>
<script>
$(document).ready(function () {
$("#type").change(function () {
var val = $(this).val();
if (val == "item1") {
$("#size").html("<option value='test'>item1: test 1</option><option value='test2'>item1: test 2</option>");
} else if (val == "item2") {
$("#size").html("<option value='test'>item2: test 1</option><option value='test2'>item2: test 2</option>");
} else if (val == "item3") {
$("#size").html("<option value='test'>item3: test 1</option><option value='test2'>item3: test 2</option>");
} else if (val == "item0") {
$("#size").html("<option value=''>--select one--</option>");
}
});
});
</script>