Http-https transitions and relative URLs. When building a web site with HTTPS pages, one of the annoying tasks is to ensure that those pages make no references to HTTP resources.
If they do, then Internet Explorer will pop up alarming messages about mixing secure and insecure content, and do you want to display the insecure content. This confuses users and generally discourages them from continuing to use your site. To fix the problem, all URLs on the page must use HTTPS. Web sites these days are built from reusable components, some of which may be used on both HTTP and HTTPS pages. Using the DOCTYPE Tag. Having trouble with your Web pages?
Can't get them to display correctly in your browser? It might be that your page is a little "quirky. " W3Schools Online Web Tutorials.