How to use ajax animation extender

<style type="text/css">.flyOutDiv{display: none; position: absolute; width: 400px; z-index: 3; opacity: 0; filter: (progid: DXImageTransform.Microsoft.Alpha(opacity=0)); font-size: 18px; border: solid 1px #FFFFFF; background-color: #FFFFFF; padding
} : 5px;.flyOutDivCloseX{background-color: #666666; color: #FFFFFF; text-align: center; font-weight: bold; text-decoration: none; border: outset thin #FFFFFF; padding
}
: 5px; </style>