XHTML 1.0 and CSS 3.0 responsive design. Page will change when screen resolution changes. Page was designed to be tablet, iphone and print friendly. A working example can be seen on my web site: http://christinafleming.net/web-portfolio.html
I am a certified technology professional, having worked in IT for over 16 years. I love building web sites, and can code in HTML\XHTML with CSS 2.0\3.0 including converting PSD's. All of my code is valid W3C.