JS中把字符轉成ASCII值

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

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);

輸出： 65 A z