<head>
<script>
function check(){
var num = document.getElementById("choose").value;
alert(num);
if(num=="4"){
document.getElementById("show").style.display="block";
}else{
document.getElementById("show").style.display="none";
}
}
</script>
</head>
<body onload="check()">
<select id="choose" onchange="check()">
<option value="1"> The first </option>
<option value="2"> The second </option>
<option value="3"> The third </option>
<option value="4"> The fourth </option>
</select>
<div id="show" style="display:none;">
<table>
<tr>
<td> Where there is a will, there is a way </td>
<td> God pays those who help themselves </td>
</tr>
</table>
</div>
</body>