JS中把字符转成ASCII值

字符转ascii码：用charCodeAt(); ascii码转字符：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);

输出： 65 A z