You have a significant number of code validation errors. Start by fixing these:
[Invalid] Markup Validation of http://www.tylasproducts.com/?justsaying=1 - W3C Markup Validator
Also, it looks like this was built with something other than Dreamweaver. I'm seeing a lot of Microsoft proprietary code.
If you want to optimize your sites to perform well in mobile & tablet devices, you'll need to re-build with Responsive Web Design methods and CSS Media Queries. The one-size-fits-all days are over. People use a variety of different web devices to surf the web now. Everything from 320px wide to ultra-wide, multi-panel displays.
Responsive Web Design
http://coding.smashingmagazine.com/2011/01/12/guidelines-for-responsive-web-design/
Introduction to CSS Media Queries
http://www.adobe.com/devnet/dreamweaver/articles/introducing-media-queries.html
Nancy O.