如何根据选定的下拉列表更改提交按钮ID？

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 我想根据选定的下拉列表更改提交按钮ID，而不提交。如果我选择了Live Bookmark，则提交按钮的ID应该更改为A1而无需提交。我该怎么做。有人可以建议。以下是我的代码

<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: 您可以在选择下拉列表中侦听change事件，并动态分配id属性，如下面的代码片段所示：

 $('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. 如果要通过jquery事件执行此操作，请向您的提交按钮添加一个类，并删除onchange="myFunction()" 。 otherwise put that code in myFunction . 否则将代码放在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 这是工作示例

Answer 4

Alternative way with pure javascript: 纯JavaScript的替代方法：

Place the JavaScript function to change id in the <head> of the HTML page. 将JavaScript函数放置在HTML页面的<head>中以更改id。

<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. 然后按如下所示修改您的<select> ，以在选择更改时使用新的ID调用该函数。

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

The whole code: 整个代码：

 <!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>

如何根据选定的下拉列表更改提交按钮ID？

问题描述

4 个解决方案

解决方案1
2 2017-12-02 05:49:34

解决方案2
2 2017-12-02 05:57:49

解决方案3
1 2017-12-02 05:45:52

解决方案4
0 2017-12-02 06:36:09

如何根据选定的下拉列表更改提交按钮ID？

问题描述

4 个解决方案

解决方案1 2 2017-12-02 05:49:34

解决方案2 2 2017-12-02 05:57:49

解决方案3 1 2017-12-02 05:45:52

解决方案4 0 2017-12-02 06:36:09

解决方案1
2 2017-12-02 05:49:34

解决方案2
2 2017-12-02 05:57:49

解决方案3
1 2017-12-02 05:45:52

解决方案4
0 2017-12-02 06:36:09