用文本框输入来查处键盘的Uintin的值

<SCRIPT LANGUAGE="JavaScript" type="text/jscript">

<!-- Begin 开始写的JavaScript代码

function showKeyCode()

{

var character = document.characterCode.character.value.substring(0,1);

var code = document.characterCode.character.value.charCodeAt(0);

var msg = "字符 /""+character+"/" 对应的ASCII码值为 "+code+".";

alert(msg);

}

// End -->

</script>

<form name="characterCode">

<center>输入一个待查字符:

<input type="text" name="character" size="15">

<input type="button" value="显示该键值" onClick="showKeyCode();">

</center>

</form>