Web Resources

Royalty Free Images

Free once you purchase

• http://istockphoto.com/ - Royalty free clip-art (although you need to purchase it).

Great Articles

• 22 Best Responsive CSS Frameworks

Widgets

• Range Sliders
• 25 Amazing CSS Range Slider Designs
• http://rangeslider.js.org
• https://codepen.io/seanstopnik/pen/CeLqA
• Bootstrap slider
• https://www.cssscript.com/responsive-touch-enabled-range-slider-in-vanilla-javascript-rangeslider/

Useful Web Sites

• Walterzorn - DHTML magic, including JavaScript Graphics
• Dream Avatar
• EPA Air Quality Database