Javascript code working in JSFiddle but not in my page

The code is copied from jsfiddle, but not working in my webpage. I tried to include the script at bottom and added document.ready function

code in JSfiddle

enter link description here

HTML

<html>
    <head>
        <title>TODO supply a title</title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
    </head>
    <body>




       <form>
    <table border = "1" id = "engagements">
        <tr>
            <th><input type="checkbox" onclick="checkAll(this)"></th>
            <th>Organization</th>
            <th>Project</th>
            <th>Product</th>
            <th>Activity</th>
        </tr>
        <tr>
            <td><input type="checkbox" onclick="checkAll(this)"></td>
            <td><input type = "text"/></td>
            <td><input type = "text"/></td>
            <td><input type = "text"/></td>
            <td><input type = "text"/></td>
            <!--
            <td><input type = "text"/></td>
            <td><input type = "text"/></td>
            <td><input type = "text"/></td>
            <td><input type = "text"/></td>
            <td><input type = "text"/></td>
            -->
        </tr>
    </table>

    <select name = "mode" id = "mode" onchange="addrow('engagements')">
        <option value="">Add More Rows with Same Data as Above</option>
        <option value="1">1 More</option>
        <option value="2">2 More</option>
        <option value="3">3 More</option>
        <option value="4">4 More</option>
        <option value="5">5 More</option>
     </select>

</form>

</body>
</html>

Error in webpage

newhtml.html:43 Uncaught ReferenceError: addrow is not defined at HTMLSelectElement.onchange (newhtml.html:43)

    <script src="jquery-3.3.1.min.js">
            $(document).ready(function() {
           $("#mode").on('change', function () {
    var rows = parseInt(this.value);
    var lastRow;
    for (var i = 0; i < rows; i++) {
        lastRow = $('#engagements tr').last().clone();
        $('#engagements tr').last().after(lastRow);
    }
}); 
            }      
</script>

any help will be highly appreciated

Solution

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script type="text/javascript">
        $(document).ready(function() {
       $("#mode").on('change', function () {
var rows = parseInt(this.value);
var lastRow;
for (var i = 0; i < rows; i++) {
    lastRow = $('#engagements tr').last().clone();
    $('#engagements tr').last().after(lastRow);
}
     }); 
           });


</script>