function transform_login()
{
  var password = document.getElementById('passwd').value;
  var salt = document.getElementById('special_sauce').value;
  
  var hash = sha1Hash(encrypt(password) + salt);
  var fake_pass = randomString(password.length);
  document.getElementById('hashed_pw').value = hash;
  document.getElementById('passwd').value = fake_pass;
  
}
function randomString(len)
{
    var chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz";
    var randomstring = '';
    for (var i=0; i<len; i++)
    {
        var rnum = Math.floor(Math.random() * chars.length);
        randomstring += chars.substring(rnum,rnum+1);
    }
    return randomstring;
}
function emptyFields()
{
        document.getElementById('passwd').value = "";
        document.getElementById('username').value = "";
}
function encrypt(str)
{
    return sha1Hash(str);
}