validation of sc login

We really can't. The SCLogin module is designed for HTML5 validation and, even then, there are some elements that won't perfectly validate due to various reasons. Your site is using the slightly older XHTML 4 transitional spec, which has different requirements than HTML5. However, all browsers can interpret the elements in the SCLogin module without any issue regardless of the spec you've specified for your document.

In general, we don't focus on validation unless its causing any functional issues on your site. If you are having any functional problems, we'll gladly help fix those problems however we can.

Thanks,
Alex

No problem, we understand. When you decide to upgrade your template to HTML5 which is the new standard and supported by all browsers on both mobile and desktop, we hope you'll consider using the SCLogin module again.

Thanks,
Alex