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qTip is an advanced tooltip plugin powered by jQuery JavaScript framework. It is cross-browser, highly customizable, feature rich script that allows you to create beautiful tooltips with minimum effort. qTips have built in support for rounded-corners, AJAX and custom effects.

qTip comes with a comprehensive and well documented API allowing you easily extend it through a variety of optional callback methods and library attributes.

Features:

• Cross Browser – Support all major web browsers.
• Degradable – Since all of the HTML is generated dynamically people with JavaScript disabled will see no leftovers.
• Rounded Corners – Includes cross-browser border-radius engine that doesn’t require PNGs.
• Easy Positioning.
• Styles – Pre-packed with 5 elegant tooltip styles for use without any extra code! You can easily create a custom style using styles object.
• Stacking – Tooltips automatically focus when hovered over, and even preserve their stacking order on the page.
• Custom Effects – Comes with fade, slide and grow effects for showing/hiding your tooltips. Support for custom effect functions means that you’ve got an unlimited amount of effects at your fingertips!
• AJAX – Content can be loaded dynamically even after the page is loaded!

Developed by Craig Thompson; qTip jQuery Tooltip Plugin is available for download under the MIT License.  You can find further information, demos & download on qTip Website.