When I click proceed to checkout on cart page and redirect to checkout page it only shows "Login Already registered?", I also want checkout as guest there but I am unable to show it. Please help me how can I show checkout as guest functionality on checkout page. Thanks in advance.
you can enable guest checkout from
system > configuration > sales > checkout
I'm not sure what Magento version you are using.
Anyway this is a configuration setting in the admin panel.
System > Configuration > SALES > Checkout > Checkout options
See the image below
I had the same issue after upgrading CE 1.7->1.9; guest checkout was not showing on the checkout page, only the 'Register' and 'Login' options.
To resolve this, I set the 'Allow Guest Checkout' option to 'No' and saved the config like this. Then switched it back to 'Yes' and saved it again. Perhaps some database fields needed a refresh after the upgrade.