JavaScript按钮单击时将用户输入存储在数组中

<table>
        <tr>
            <td>Enter the Input</td>
            <td><input type="text" id="inputtext" /></td>
        </tr>
        <tr>
            <td></td>
            <td><button type="button" id="add" onclick="addRecord();">Add </button>
            <button type="button" id="display" onclick="displayRecord();">Display</button>
            </td>
        </tr>
</table>
<table>
        <tr>
            <td>Enter the