<input name="login" type="text" autocomplete="off" required>
<input name="password" type="password" required autocomplete="off">
and this is my js code for disable autocomplete
<script>
$(document).ready(function(){
$(':input').live('focus',function(){
$(this).attr('autocomplete', 'off');
});
$('form').attr('autocomplete','off');
});
</script>