Creating loading animations is a little tedious. Most developers solve this issue by keeping a small library of basic animations, which they reuse at will. Now, it is possible to easily create CSS spinners and bars for AJAX and JQuery by using the great tools at CSSLoad.net. You can easily set up to two colours, width, height and animation speed from a selection of templates and quickly build a loading animation, then get the code.
Brilliant little tool, worth checking out! I think a lot of web-apps could learn from the great layout and easy functionality of CSSLoad.net.