字符轉(zhuǎn)ascii碼：用charCodeAt();
ascii碼轉(zhuǎn)字符：用fromCharCode();

看一個(gè)小例子

復(fù)制代碼 代碼如下:

<script>
str="A";
code = str.charCodeAt();
str2 = String.fromCharCode(code);
str3 = String.fromCharCode(0x60+26);

document.write(code+'<br />');
document.write(str2+'<br />');
document.write(str3);
</script>

65
A
z