pop-up "I.E.has blocked this website from displaying non-secure conten

How to build my site to avoid this message?

[Hubie]

I have a "register" button on my website where users can create an account. However, every time someone clicks the "register now" button on my home page, that darn yellow pop up "Ineternet Explorer has blocked this website from displaying non-secure content".

My host and I have determined the issue is with the image of the "register now" button they are clicking. But we dont know what to do with this file so our users can click this button and go to a sign-up page without getting the non-secure message?

[daveVk]

You may have a mix of https: ( secure web page ) and http: requists
( button requist or image ), if so try making them all https

[pixeltierra]

note that also considered insecure are plain jpg images that don't live on the https server.