Kendo UI for jQuery
The jQuery Popup component can be used to present content next to an HTML element. It is typically laid over other content to display critical information or provide users with choices. It can be used as a standalone component and comes integrated into several other Kendo UI for jQuery components.
The Popup component has built-in calculations for displaying the popup but also lets you to align the popup to other components.
Read the jQuery Popup Aligning and Positioning documentation