SSL certificate does not adapt well to HTML files under SSL-certified directories

Currently,
like an attachment on a website's content, SSL certification may not work.

SSL certificates are properly configured and
in different directories in the same domain We have verified that the SSL certificate is successful.

Google Chrome's
Why this message is displayed On the website → Right-click to verify elements, so
I looked it up using this feature.

Then,

http://cse.google.com/coop/cse/brand

http://www.example.co.jp/example/general/404.html

I found out that this part is used in HTML.
(Both do not have https)

SSL certificate does not seem to work properly because of the above.

However, the URL http://cse.google.com/coop/cse/brand is
The entire website uses Google's functionality for the in-site search window.

like https://cse.google.com/coop/cse/brand. Regarding Google's website, is there a way to use https?

For http://www.example.co.jp/example/general/404.html, you can also use
Commonly used throughout the website, defined in .htaccess as follows
I did.

ErrorDocument 404/example/general/404.html

It seems that the above definition also works in the https area.
How
to make the above definition not work and the 404 dedicated to the https area work Should I set it up?

This question is a little far from the programming question, but I am currently asking
I'd like to solve it somehow because it will interfere with programming.

If you know, please let me know.

[Development environment]

• HTML

• CSS

• JavaScript

• Rental Server (CentOS5)

• PHP (5.2.16)

• Work environment (Windows 7 pro)

• For code editing (NoEditor)

HTML

CSS

JavaScript

Rental Server (CentOS 5)

PHP (5.2.16)

Work environment (Windows 7 pro)

For code editing (NoEditor)