show() hide() checkbox : jquery

Question

I want to show and hide a checkbox(sem_1_ma_english) depending upon the values of a Dropdown(course_english) list.

When I select a values from the DROPDOWN list, then the CHECKBOX should be displayed otherwise not.

Html structure:For Checkbox

<div class="form-row">
<label for="sem_1_ma_english">
   Semester I – Subjects for M. A. English
<span class="helptext"></span>
</label>
<label for="sem_1_ma_english-poetry">
<input id="sem_1_ma_english-poetry" class="" type="checkbox" checked="yes" value="Poetry" name="sem_1_ma_english[]">
 Poetry
</label>
<label for="sem_1_ma_english-drama">
<input id="sem_1_ma_english-drama" class="" type="checkbox" checked="yes" value="Drama"  name="sem_1_ma_english[]">
Drama
</label>
<label for="sem_1_ma_english-fiction">
<input id="sem_1_ma_english-fiction" class="" type="checkbox" checked="yes" value="Fiction" name="sem_1_ma_english[]">
Fiction
</label>
<label for="sem_1_ma_english-prose">
<input id="sem_1_ma_english-prose" class="" type="checkbox" checked="yes" value="Prose"  name="sem_1_ma_english[]">
Prose
</label>
</div>

So I have used the piece of code to solve the problem

$("#course_english").change(function() {
    if ($("#course_english").val() == "MA English") {
        $("#sem_1_ma_english").parent().show();
    } else {
        $("#sem_1_ma_english").parent().hide();
        $("#sem_1_ma_english").val('');
    }
});

But sadly it is not working.

Answer 1

For your issue check this jsbin: http://jsbin.com/ujuxiy/1/edit

if this is your html:

<select id="course_english" class="" name="course_english"> 
    <option value="">--Select One--</option> 
    <option value="MA English">MA English</option> 
    <option value="B. A. (Hons.) with Mass Communication">B.A. (Hons.) with Mass Communication</option> 
    <option value="M. A. (English)">M. A. (English)</option> <option value="M. Phil.">M. Phil.</option> 
</select>


  <div class="form-row">
  <label for="sem_1_ma_english">
      Semester I – Subjects for M. A. English
      <span class="helptext"></span>
  </label>
  <label for="sem_1_ma_english-poetry">
      <input id="sem_1_ma_english-poetry" class="sem_1_ma_english" type="checkbox"     checked="yes"      value="Poetry" name="sem_1_ma_english[]">
Poetry
 </label>
 <label for="sem_1_ma_english-drama">
  <input id="sem_1_ma_english-drama" class="sem_1_ma_english" type="checkbox" checked="yes"     value="Drama"  name="sem_1_ma_english[]">
Drama
</label>
 <label for="sem_1_ma_english-fiction">
  <input id="sem_1_ma_english-fiction" class="sem_1_ma_english" 
   type="checkbox" checked="yes" value="Fiction" name="sem_1_ma_english[]">
  Fiction
 </label>
 <label for="sem_1_ma_english-prose">
 <input id="sem_1_ma_english-prose" class="sem_1_ma_english" type="checkbox" checked="yes"      value="Prose" name="sem_1_ma_english[]">
 Prose
</label></div>

then this should be your jquery for this:

 $(function(){
    $(".form-row").hide();
       $("#course_english").change(function() {
         if ($("#course_english").val() == "MA English") {
             $(".form-row").show();
         } else {
            $(".form-row").hide();
         }
    });
 });

Answer 2

Try this one
HTML

<div class="form-row">
<label for="sem_1_ma_english">
Semester I – Subjects for M. A. English
<span class="helptext"></span>
</label>
<label for="sem_1_ma_english-poetry">
<input id="sem_1_ma_english-poetry" class="sem_1_ma_english" type="checkbox" checked="yes"      value="Poetry" name="sem_1_ma_english[]">
Poetry
</label>
<label for="sem_1_ma_english-drama">
<input id="sem_1_ma_english-drama" class="sem_1_ma_english" type="checkbox" checked="yes"     value="Drama"  name="sem_1_ma_english[]">
Drama
</label>
<label for="sem_1_ma_english-fiction">
<input id="sem_1_ma_english-fiction" class="sem_1_ma_english" 
type="checkbox" checked="yes" value="Fiction" name="sem_1_ma_english[]">
Fiction
</label>
<label for="sem_1_ma_english-prose">
<input id="sem_1_ma_english-prose" class="sem_1_ma_english" type="checkbox" 
 checked="yes"      value="Prose"  
 name="sem_1_ma_english[]">
 Prose
</label>

ANd jQuery code should be like this

$("#course_english").change(function() {
   if ($("#course_english").val() == "MA English") {
       $(".sem_1_ma_english").parent().show();
   } else {
       $(".sem_1_ma_english").parent().hide();
       $(".sem_1_ma_english").val('');
   }
});

Try this one this is working for me , and work for you....

Answer 3

Have you tried using the 'toggle()' method? I prefer this to alternating 'show' and 'hide'. This method works well with click events but I haven't tried it with selecting values.

eg

 $(".sem_1_ma_english").parent().show(); //Shows initially
      if ($("#course_english").val() == "MA English") {
        $(".sem_1_ma_english").parent().toggle();
      };    
    });