How can i change submit button id based on selected dropdown list?

Question

I want to change submit button id based on selected dropdown without submit.If i selected Live Bookmark ,the id of submit button should change to A1 without submit.How can i do that.Can anybody suggest.Below is my code

<form class="form-horizontal" role="form" action="" method="post" enctype="multipart/form-data">
           <div class="row">
              <div class="col-md-12">
                 <div class="form-group">
                    <div class="col-md-9">
                       <select id="one" name="sub" class="form-control" onchange="myFunction()">
                          <option value="0">Select</option>
                          <option value="H1" id="A1" >Live Bookmark</option>
                          <option value="H2" id="A2">My Yahoo</option>
                          <option value="H3" id="A3">My Free Dictionary</option>
                          <option value="H4" id="A4">My Daily Rotation</option>
                          <option value="H5" id="A5">My Podnova</option>
                       </select>
                    </div>
                 </div>

                 <div class="form-group">
                    <div class="col-md-9">
                       <button type="submit" name="submit" id="$id">Subscribe Now</button>
                    </div>
                 </div>

              </div>
           </div>
        </form>

Answer 1

You can listen for a change event in select dropdown and assign the id attribute dynamically as shown in the code snippet below:

 $('document').ready(function(){ $('#one').on('change', function() { $('button[type=submit]').attr('id', $(this).find(":selected").attr('id')); console.log('Button Id is '+ $(this).find(":selected").attr('id')); }) })

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.js"></script> <form class="form-horizontal" role="form" action="" method="post" enctype="multipart/form-data"> <div class="row"> <div class="col-md-12"> <div class="form-group"> <div class="col-md-9"> <select id="one" name="sub" class="form-control"> <option value="0">Select</option> <option value="H1" id="A1" >Live Bookmark</option> <option value="H2" id="A2">My Yahoo</option> <option value="H3" id="A3">My Free Dictionary</option> <option value="H4" id="A4">My Daily Rotation</option> <option value="H5" id="A5">My Podnova</option> </select> </div> </div> <div class="form-group"> <div class="col-md-9"> <button type="submit" name="submit" id="$id">Subscribe Now</button> </div> </div> </div> </div> </form>

Answer 2

function myFunction(id){
  var thisElem = $("#"+id);
  var selectedValue = $.trim(thisElem.val());
  //console.log(selectedValue);
   $("button[type=submit]").attr("id", selectedValue);
}

<select id="one" name="sub" class="form-control" onchange="myFunction(this.id);">
  <option value="0">Select</option>
  <option value="H1" id="A1" >Live Bookmark</option>
  <option value="H2" id="A2">My Yahoo</option>
  <option value="H3" id="A3">My Free Dictionary</option>
  <option value="H4" id="A4">My Daily Rotation</option>
  <option value="H5" id="A5">My Podnova</option>
  </select>

<button type="submit" name="submit" id="$id">Subscribe Now</button>

Answer 3

Add a class to your submit button and remove the onchange="myFunction()" if want to do that by jquery events. otherwise put that code in myFunction .

<button type="submit" name="submit" class="test" id="">Subscribe Now</button>
$(document).ready(function () {
    $("#one").change(function () {
        $(".test").attr('id', $(this).children(":selected").attr("id"));
    })
})

Here is the working example

Answer 4

Alternative way with pure javascript:

Place the JavaScript function to change id in the <head> of the HTML page.

<head>
<script>
    function myFunction(new_id) {
        if (new_id == 0) {
            return // this is so that if "select" is selected then id won't change
        }
        // change id
        document.getElementsByName("submit")[0].id = new_id;
    }
</script>
</head>

Then modify your <select> as follows to call the function with the new id when selection changes.

<select id="one" name="sub" class="form-control" onchange="myFunction(this.value);">

The whole code:

 <!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> <title> new document </title> <meta name="description" content="" /> <script> function myFunction(new_id) { if (new_id == 0) { return; } document.getElementsByName("submit")[0].id = new_id; // test new id // remove this after testing alert(document.getElementById(new_id).id); } </script> </head> <body> <form class="form-horizontal" role="form" action="" method="post" enctype="multipart/form-data"> <div class="row"> <div class="col-md-12"> <div class="form-group"> <div class="col-md-9"> <select id="one" name="sub" class="form-control" onchange="myFunction(this.value)"> <option value="0">Select</option> <option value="H1" id="A1" >Live Bookmark</option> <option value="H2" id="A2">My Yahoo</option> <option value="H3" id="A3">My Free Dictionary</option> <option value="H4" id="A4">My Daily Rotation</option> <option value="H5" id="A5">My Podnova</option> </select> </div> </div> <div class="form-group"> <div class="col-md-9"> <button type="submit" name="submit" id="">Subscribe Now</button> </div> </div> </div> </div> </form> </body> </html>

How can i change submit button id based on selected dropdown list?

Question

4 answers

solution1
2 2017-12-02 05:49:34

solution2
2 2017-12-02 05:57:49

solution3
1 2017-12-02 05:45:52

solution4
0 2017-12-02 06:36:09

How can i change submit button id based on selected dropdown list?

Question

4 answers

solution1 2 2017-12-02 05:49:34

solution2 2 2017-12-02 05:57:49

solution3 1 2017-12-02 05:45:52

solution4 0 2017-12-02 06:36:09

solution1
2 2017-12-02 05:49:34

solution2
2 2017-12-02 05:57:49

solution3
1 2017-12-02 05:45:52

solution4
0 2017-12-02 06:36:09