jQuery provides many general function to build a rich pages. jQuery feature:

• Ajax
  jQuery is one of the ajax framework that used mostly by many web master.
• Shortcut access to DOM
  instead of using bulk of code in accessing DOM, jQuery have the shortcut.
• Manipulating the element content
  With jQuery, we can freely insert, update and delete every HTML element.
• Easy event handling
  Event handling is no fear again in web pages, jQuery make the process simple.
• Animation
  by default, jQuery already have ability to perform general animation on the pages.
• Action Chaining
  Instead of using many temporary variable and repetition lines, we can easily unite several lines of code that have same characteristic to a line code with chaining.
• CSS Compliance
  The jQuery selector is CSS Compliance, that make any designer that already have knowledge about CSS is able to learn jQuery easily.
• Cross browser
  using jQuery, no more hack for IE… the framework has done it automatically.