Could you please help me with embedding sign-in form to my site.

I use iframe with  https://accounts.zoho.com/login?servicename=ZohoCreator&serviceurl=http%3A%2F%2Fwww.mysite.com&hide_signup=true

But when i'm loggin i will redirect to http s://www.mysite.com  I'm not seeing https links. I have browser warning about different SSL in this link.

And what's mean "dcc" and load_ifr tag's in Zoho url

Thanks!