<div class="test">
<select name="stbType" id="stbType">
<option value="_0">Design</option>
<option value="_1">User</option>
<option value="_2">Admin</option>
<option value="_3">Dragon</option>
</select>
<div class="oneView" id="oneView">
<span>입력방법1 : </span><input type="text" readonly /> 링크
</div>
<div class="twoView" id="twoView" style="display:none;">
<span>입력방법2 : </span><input type="text" />
</div>
<div class="threeView" id="threeView" style="display:none;">
<span>입력방법3 : </span><input type="text" value="" disabled />
</div>
</div>
<script src="~/Scripts/jquery-3.3.1.min.js"></script>
<script type="text/javascript">
$(function () {
$('#stbType').on('change', function () {
if ($(this).val() == '_0') {
$('#oneView').css('display', 'block');
$('#twoView').css('display', 'none');
$('#threeView').css('display', 'none');
} else if ($(this).val() == '_1') {
$('#oneView').css('display', 'none');
$('#twoView').css('display', 'block');
$('#threeView').css('display', 'none');
} else {
$('#oneView').css('display', 'none');
$('#twoView').css('display', 'none');
$('#threeView').css('display', 'block');
}
});
});
</script>