保护Email的方法

在一本书上看到的，使用js……

<script type="text/JavaScript">
document.write('<a href="');
t1 = "mai";
t2 = "lto";
t3 = ":";
t4 = "jill";
t5 = "&#64;";
t6 = "oasi";
t7 = "softra";
t8 = "nquil";
t9 = "ity";
t10 = ".";
t11 = "com";
text = t1+t2+t3+t4+t5+t6+t7+t8+t9+t10+t11;
document.write(text);
document.write('">Mail Jill</a>');
</script>