<!-- 把下列代码加到<body>区域中 -->
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
function showKeyCode()
{
var character = document.characterCode.character.value.substring(0,1);
var code = document.characterCode.character.value.charCodeAt(0);
var msg = "这个字母"+character+"的ASCII码是："+code+".";
alert(msg);
}
// End -->
</script>
<form name="characterCode">
<center>请输入一个字母：
<input type="text" name="character" size="15">
<input type="button" value="看一下键值" onClick="showKeyCode();">
</center>
</form>