tooltip 效果
http://www.cnblogs.com/xuyi/articles/1229576.html
40+ 鼠标提示脚本(AJAX,JavaScript & CSS)
http://jandan.net/2007/06/13/40-tooltips-scripts-with-ajax-javascript-css.html
jquery实现的动画隐藏登陆框下载
http://www.okajax.com/a/200905/Sliding_login_panel_jquery.html
A library of DHTML and Ajax scripts