Numerous undefined notices

Notice: Undefined variable: redirect in wp-content/plugins/login-with-ajax/login-with-ajax.php</b> on line <b>310</b>
jQuery183033065382204949856_1367275767725({ ‘result’: true, ‘message’: ‘Login Successful, redirecting…’ })

Notice: Undefined variable: user_login in wp-content/plugins/login-with-ajax/widget/default/widget_out.php on line 22

Notice</b>: attribute_escape is deprecated since version 2.8! Use esc_attr() instead. in wp-includes/functions.php on line 2839

Notice: Undefined variable: redirect in wp-content/plugins/login-with-ajax/login-with-ajax.php on line 282

Warning: Cannot modify header information – headers already sent by (output started at wp-content/plugins/login-with-ajax/login-with-ajax.php:282) in wp-includes/pluggable.php on line 876

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