在另外一个重复的帖子回复的。。。
http://www.v2ex.com/t/42758#reply1<a id="mail" href="javascript:showmail();">点击显示</a>
JS:
function showmail(){
var mail = document.getElementById('mail');
var emailriddlerarray = [xx,xx,xx,xx,xx]; //xx对应邮箱地址的每个字母的ascii码，事先生成
var encryptedemail_id86 = ''; //variable to contain encrypted email
for (var i = 0; i < emailriddlerarray.length; i++) {
encryptedemail_id86 += String.fromCharCode(emailriddlerarray[i]);
}
mail.innerHTML = encryptedemail_id86;
mail.href = 'mailto:' + encryptedemail_id86;
}