jQuery function textbox Dynamic

<div class="form-group">
	<label class="control-label col-xs-12 col-sm-3 no-padding-right" for="jenis">Jenis Kejahatan</label>

	<div class="col-xs-12 col-sm-9">
		<div class="clearfix">
			<select class="input-medium" id="jenis" name="jenis">
				<option value="pencurian">Pencurian</option>
				<option value="kriminal">Kriminal</option>
				<option value="pembunuhan">Pembunuhan</option>
				<option value="lain">Lain-lain</option>
			</select>
		</div>
		<div class="hide" id="lainJenis">
			<input type="text" name="lain" id="lain" class="col-xs-12 col-sm-8" />
		</div>
	</div>
</div>