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Show and hide the html element when the option change is selected

On the JSP page, I have a drop down list. When the first element of the list is selected, I want the text area to be displayed right click. I am new to Javascript / Jquery, so I clearly don't see anything in this function (the text area never appears). Hope someone can help.

This is HTML:

<tr class="odd gradeX">
    <td class="col-lg-3">
        <div>
            <label>Show text area</label>
            <select id="show" class="form-control" name="show_text_area" onchange="change()">
                <option value="1">YES</option>
                <option value="0">NO</option>
            </select>

        </div>
    </td>
    <td class="col-lg-3">
        <div>
            <label>Text area</label>
            <textarea id="text_area" class="form-control" type="text" name="text_area" placeholder="Write something" rows="5" cols="50" style="display: none"></textarea>
        </div>
    </td>
</tr>

This is the function above JSP:

<script> function change() {
    var selectBox = document.getElementById("show");
    var selected = selectBox.options[selectBox.selectedIndex].value;
    var textarea = document.getElementById("text_area");
    if(selected === '1'){
        textarea.show();
    }
    else{
        textarea.hide();
    }
});</script>
+4
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10 answers

You have an error at the end of your function - delete the last one);

Finally, it should be:

<select id="show" class="form-control" name="show_text_area" onchange="change(this)">


function change(obj) {


    var selectBox = obj;
    var selected = selectBox.options[selectBox.selectedIndex].value;
    var textarea = document.getElementById("text_area");

    if(selected === '1'){
        textarea.style.display = "block";
    }
    else{
        textarea.style.display = "none";
    }
}
+6
source

You can use jQuery as follows

<script> function change() {
    var selectBox = document.getElementById("show");
    var selected = selectBox.options[selectBox.selectedIndex].value;

    if(selected === '1'){
        $('#text_area').show();
    }
    else{
        $('#text_area').hide();
    }
}</script>
+3
source

jquery.

$('#show').val();
   if( $('#show').val() == "1")
    {
         $('#text_area').show(); 
              OR
           $("#text_area").css("visibility", "visible");
   }else
   {
      $('#text_area').hide(); 
              OR
           $("#text_area").css("visibility", "hidden");
  }
+1

  • jQuery.

  • onchange="change()"

    <select id="show" class="form-control" name="show_text_area" onchange="change()">

  • , .

    $('#show').on('change', function () {
   var optionSelected = $("option:selected", this);
   var valueSelected = this.value;
   if(valueSelected == 1){
       $("#text_area").show();
   } else {
       $("#text_area").hide();
   }
});

Fiddle

+1

:

// This will create an event listener for the change action on the element with ID 'show'
$('#show').change(function() {

     // If checkbox is 'checked'
    if($(this).is(':checked')) {
        // show the element that has the id 'txt_area' 
        $('#text_area').show();
    } else {
        // hide it when not checked
        $('#text_area').hide();
    }
});
+1

jQuery .

$("#show").change(function(){
   if($(this).val()=="1")
   {    
       $("#text_area").show();
   }
   else
   {
       $("#text_area").hide();
   }
});

0

, js Element show() hide(). .

Element.prototype.hide(){
this.style.display = "hidden";
} 
Element.prototype.show(style){
style = style ? style : "block";
this.style.display = style;
}

jquery - .

0
var drpVal=  $('#show').val();
if( drpVal == "1")
{
     $('#text_area').show(); 
          // or u can use
       $("#text_area").css("display", "");
 }
 else{
  $('#text_area').hide(); 
          // or u can use
       $("#text_area").css("display", "none");
 }
0

jQuery..... like "   $ ().ready(() {

var seletVal=$('#show option:selected').val();
if(selectVal=='1')
$('#textareaId').show();
else
$('#textareaId').hide();
});

"

0

html document.getElementById, javascript. Jquery hide() show() jquery.

, , Javascript, .

show() hide() textarea.style.display = "block" textarea.style.display = "none";

); .

.

0

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