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Editorial Team
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Asked: 2026-05-22T15:36:30+00:00

I would like to be able to launch an alert message everytime the value

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I would like to be able to launch an alert message everytime the value of the dropdown is changed. I thought the code below should have worked but it is not for some unknow reason. Any ideas why?

Thanks.

<html>
<head>
<script type="text/javascript" src="lib/jquery.js"></script>
</head>
<body>

<script type="text/javascript">
    $("select").change(function(){
        alert(this.id);
    });
</script>


<select>
    <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
</select>

</body>
</html>
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1 Answer

  1. Editorial Team

    The code is fine, you just aren’t initialising it correctly.

    Try….

    $(document).ready(function() {
    $("select").change(function(){
        alert(this.id);
    });
});

    see the documentation here.

    Your function alerts the id of the select element (which you haven’t assigned to anything anyway). I’m assuming you actually wanted to get the value from the dropdown? In which case you want:

    alert($(this).val());
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