How to display a hidden checkbox field in a JSP page on the basis of specific value selected from dropdown in Struts 1.3 framework?

Question

I want to create a checkbox in Struts 1.3 framework using Nested Tags, Javascript etc which should only be displayed when a user selects a specific value from a select dropdown and the value of checkbox should get reset when user chooses other values from dropdown.

Answer 1

As you have not posted your code I have managed it my own, tried to provide answer

jsFiddle

 $(document).ready(function () {
     $(function () {
         $("#id-select").change( function(){
          var $this = $(this);
            $('input[type=checkbox]').each( function(){
             if( $(this).val() == $this.val()) {
               
                $(this).parent().siblings().css('display', 'none');
               $(this).parent().css('display', 'block');
                
               $('input[type=checkbox]').css('display', 'none');
               $(this).css('display', 'block');
              }
            })
          });
     });
 });

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select id='id-select'>
  <option value="">Select</option>
  <option value="volvo">Volvo</option>
  <option value="saab">Saab</option>
  <option value="opel">Opel</option>
  <option value="audi">Audi</option>
</select>
<br>
<div>

<label for="volvo" style='display:none;'>
  <input type="checkbox" id="volvo" value="volvo" style='display:none;'>
volvo</label>

<label for="saab" style='display:none;'>
  <input type="checkbox" id="saab" value="saab" style='display:none;'> saab</label>
  
<label for="opel" style='display:none;'>
  <input type="checkbox" id="opel" value="opel" style='display:none;'> opel</label>
  
<label for="audi" style='display:none;'>
<input type="checkbox" id="audi" value="audi" style='display:none;'>
audi</label>

</div>

UPDATE using JavaScript
Hello @Arvind I have changed this to work with JavaScript,
May be lots of improvement needed, I do not code in JavaScript

function showCheckBox($this) {
   var cols = document.getElementsByClassName('class-label');
    for(i=0; i<cols.length; i++) {
      cols[i].style.display =    'none';
    }
    var cols = document.getElementsByClassName('class-cb');
    for(i=0; i<cols.length; i++) {
      cols[i].style.display =    'none';
      cols[i].checked = false;
    }
 var array = document.getElementsByTagName("input");
  for(var ii = 0; ii < array.length; ii++)
  {
     if(array[ii].type == "checkbox")
     {
        if(array[ii].value == $this.value )
         {
          array[ii].style.display = 'block';
          array[ii].parentElement.style.display = 'block';
         } 
     }
  }
}

<select id='id-select' onchange="showCheckBox(this);">
  <option value="">Select</option>
  <option value="volvo">Volvo</option>
  <option value="saab">Saab</option>
  <option value="opel">Opel</option>
  <option value="audi">Audi</option>
  <option value="option1">option1</option>
  <option value="option2">option2</option>
</select>

<div>

<label for="volvo" class='class-label' style='display:none;'>
  <input type="checkbox" class='class-cb' id="volvo" value="volvo" style='display:none;'>volvo
</label>

<label for="saab" class='class-label' style='display:none;'>
  <input type="checkbox" class='class-cb' id="saab" value="saab" style='display:none;'> saab
</label>
  
<label for="opel" class='class-label' style='display:none;'>
  <input type="checkbox" class='class-cb' id="opel" value="opel" style='display:none;'>opel
</label>
  
<label for="audi" class='class-label' style='display:none;'>
  <input type="checkbox" class='class-cb' id="audi" value="audi" style='display:none;'>audi
</label>

</div>

Answer 2

function showCheckBox($this) {
   var cols = document.getElementsByClassName('class-label');
    for(i=0; i<cols.length; i++) {
      cols[i].style.display =    'none';
    }
    var cols = document.getElementsByClassName('class-cb');
    for(i=0; i<cols.length; i++) {
      cols[i].style.display =    'none';
    }
 var array = document.getElementsByTagName("input");
  for(var ii = 0; ii < array.length; ii++)
  {
     if(array[ii].type == "checkbox")
     {
        if(array[ii].value == $this.value )
         {
          array[ii].style.display = 'block';
           document.getElementById("volvo").checked = false;
          array[ii].parentElement.style.display = 'block';
         } 
     }
  }
}

<select id='id-select' onchange="showCheckBox(this);">
  <option value="">Select</option>
  <option value="volvo">Volvo</option>
  <option value="saab">Saab</option>
  <option value="opel">Opel</option>
  <option value="audi">Audi</option>
</select>
<div>

<label for="volvo" class='class-label' style='display:none;'>
  <input type="checkbox" class='class-cb' id="volvo" value="volvo" style='display:none;'>volvo
</label>

<label for="saab" class='class-label' style='display:none;'>
  <input type="checkbox" class='class-cb' id="saab" value="saab" style='display:none;'> saab
</label>
  
<label for="opel" class='class-label' style='display:none;'>
  <input type="checkbox" class='class-cb' id="opel" value="opel" style='display:none;'>opel
</label>
  
<label for="audi" class='class-label' style='display:none;'>
  <input type="checkbox" class='class-cb' id="audi" value="audi" style='display:none;'>audi
</label>

</div>