It should be noted that all libraries work in a cross-browser manner, as this is a key requirement for any such library or toolkit designed to simplify and possibly speed up the development of AJAX front-ends and Web sites.
In Dojo you find prepackaged components for common user interface elements such as menus, tabs, tooltips, date-picker, time-picker, treeview with drag-and-drop, readymade forms, input validation. Dojo also offers sortable tables, 2D vectorial graphics, animated effects like fades and wipes and it also abstracts the popular XMLHttpRequest object to a custom component. This component automatically falls back to using an IFRAME when this is convenient. Dojo also provides local data storage that extends cookies and leverages any browser's capabilities. The abstract model works with Internet Explorer, Firefox, and Safari.