在此插入代码

// TODO:
var
  username = document.getElementById('username'),
  pwd = document.getElementById('password'),
  pwd2 = document.getElementById('password-2'),
  nameReg = /^\w{3,10}$/,
  pwdReg = /^\.{6,20}$/;
if(!nameReg.test(username.value) || !pwdReg.test(pwd.value) || !pwdReg.test(pwd2.value) || pwd != pwd2)
  return false;
else 
return true;

}