我有一个由一些文本字段和组合框组成的表单。我有一个包含数据教室的组合框，我从数据库中获取的组合框中的数据。问题=如果组合框中的数据1在klic中则数据1将被隐藏。当它想要进一步数据馈送时，数据1保持隐藏状态。但隐藏的数据1由到期日期确定
FORM ADD CLASSROOM
<div class="row">
<div class="col-md-8">
<div class="panel panel-default">
<div class="panel-heading"><svg class="glyph stroked email"><use xlink:href=""></use></svg>Add Training Form</div>
<div class="panel-body">
<form action="add.php" method="POST" enctype="multipart/form-data">
<fieldset>
<!-- Training Name -->
<div class="form-group">
<label class="col-md-3 control-label" for="name">Training Name</label>
<div class="col-md-9">
<input id="name" name="name" required="required" type="text" placeholder="Tulis Nama Training" class="form-control">
</div>
</div>
<br><br>
<!-- Class Room -->
<div class="form-group">
<label class="col-md-3 control-label" for="name">Class Room</label>
<div class="col-md-9">
<select name="room" class="form-control input-sm" value=" ">
<option value="-1" selected="selected" disabled="disabled" >-Ruang Kelas-</option>
<?php
include 'admin/connection.php';
// query untuk menampilkan semua Classroom dari tabel
$query = "SELECT * FROM classroom";
$hasil = mysql_query($query);
while ($data = mysql_fetch_array($hasil))
{
echo "<option value='".$data['nama']."'>".$data['nama']."</option>";
}
?>
<option value="Other">Other</option>
</select>
</div>
</div>
<br><br>
<!-- Instructor -->
<div class="form-group" onsubmit="return validasicombobox">
<label class="col-md-3 control-label" for="name">Instructor</label>
<div class="col-md-9">
<select id="instruc" name="instructor" class="form-control input-sm" value=" ">
<option value="-1" selected="selected" disabled="disabled" >-Instructor-</option>
<?php
include 'admin/connection.php';
// query untuk menampilkan semua Classroom dari tabel
$query = "SELECT * FROM instruk";
$hasil = mysql_query($query);
while ($data = mysql_fetch_array($hasil))
{
echo "<option value='".$data['nama']."'>".$data['nama']."</option>";
}
?>
<option value="Other">Other</option>
</select>
</div>
</div>
<br><br>
<!-- Time -->
<div class="form-group">
<label class="col-md-3 control-label" for="name">Time</label>
<div class="col-md-9">
<input id="time" name="time" type="text" required="required" placeholder="Tulis Waktu Training" class="form-control">
</div>
</div>
<br><br>
<!-- Start Date -->
<div class="form-group">
<label class="col-md-3 control-label" for="name">Start Date</label>
<div class="col-md-9">
<input id="start_date" name="start_date" required="required" type="date" class="form-control">
</div>
</div>
<br><br>
<!-- End Date -->
<div class="form-group">
<label class="col-md-3 control-label" for="name">End Date</label>
<div class="col-md-9">
<input id="end_date" name="end_date" required="required" type="date" class="form-control">
</div>
</div>
<br><br>
<!-- Type -->
<div class="form-group">
<label class="col-md-3 control-label" for="name">Type</label>
<div class="col-md-9">
<select name="type" class="form-control input-sm">
<option value="-1" selected="selected" disabled="disabled" >-Tipe Training-</option>
<option value="Basic">Basic</option>
<option value="Type">Type</option>
</select>
</div>
</div>
<br><br>
<!-- Remark -->
<div class="form-group">
<label class="col-md-3 control-label" for="name">Remark</label>
<div class="col-md-9">
<textarea name="remark" class="form-control" rows="3"></textarea>
</div>
</div>
<br><br>
<!-- Form actions -->
<div class="form-group">
<div class="col-md-12 widget-right">
<button type="submit" value="submit" name ="submit" class="btn btn-default btn-md pull-right" onclick="return confirm('Are you sure want to add this data?');">Submit</button>
</div>
</div>
</fieldset>
</form>
</div>
</div>
</div> <!--/.main-->