Copy code code as follows:
<head>
<script>
function check () {
var num = document.getelementByid ("chooose"). Value;
alert (num);
if (num == "4") {{
document.GetelementByid ("Show"). Style.display = "Block";
} Else {
document.GetelementByid ("Show"). Style.display = "None";
}
}
</script>
</head>
<body only = "check ()">
<select ID = "choeose" onChange = "Check ()">
<option value = "1"> First </option>
<option value = "2"> Second </option>
<option value = "3"> Third </option>
<option value = "4"> Fourth </option>
</select>
<div ID = "Show" style = "display: none;">
<Table>
<tr>
<TD> Those who have aspromatic, things are actually </td>
<TD> Practitionable people, the heavens are upset </td>
</tr>
</table>
</div>
</body>