In WordPress customization we generally use custom login page for your theme , WordPress provide inbuilt login page by default. in term of customization user want to some good look & feel and for that we use we can use other plugin or you can use your own login system .
This tutorial is very interesting for those developer that want to create own login system or script.
For that i created a login system and now i am share this useful script.that will explain how to create login system in your custom theme.
First of we create a shortcode for HTML so that login system work as plugin. in functions.php you can paste this script.
This is whole custom page where i direct shortcode using php.Now you have to just create a pagefrom admin panel and select the example template and visit the page you by logout youself and then again visit this page.
Please note that i do not include jquery library . so before use this query please add latest jquery library before this script.
So your script is ready to go fly.