Some websites incorporates the AJAX technique to load certain element onto a webpage without reloading the entire page. It is common to see certain loading indicator like the one below to indicate that a process is running at the background. The indicator will disappear when the process has completed and while the page is updated.
ajaxload.info is a free webtool that allows a user to easily generate different types of loading indicator. The colour of the indicator and the background can be customized as well. A colour picker will appear when the mouse is clicked on the colour textfields. Clicking on the “Generate it !” button will generate the loading indicator in the preview panel below.
Some other indicators that can be generated are displayed below. Feel free to download it if you want to.
For more, go to ajaxload.info.