Explore the evolution of JavaScript in the context of HTML5 and CSS3 in this 40-minute conference talk from JSConfEU 2009. Gain insights from Faruk Ateş, creator of Modernizr, as he discusses website enhancements, feature detection, and best practices for cross-browser compatibility. Learn about image sprites, rounded corners, and real-world benefits of modern web technologies. Discover how to effectively leverage JavaScript to bridge the gap between different browser capabilities and create more robust web applications.