这是一款jQuery实现的仿新浪微博新消息提示框效果，支持智能浮动定位框，新浪微博用来提示消息时候的智能定位框，可以适时关闭窗口，你完全可以将其应用到你网页的其它地方。
运行效果截图如下：
在线演示地址如下：
具体代码如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>仿新浪微博新消息提示的智能浮动定位框</title> <meta http-equiv="content-type" content="text/html;charset=gb2312"> <style type="text/css"> *{margin:0;padding:0;} body{font:12px/1.8 Arial;color:#666;} h1.tit-h1{font-size:38px;text-align:center;margin:30px 0 15px;color:#f60;} .go-back{text-align:center;border-top:1px dashed #ccc;padding:10px;margin-top:20px;font-size:40px;} .wrap{border:1px dashed #ccc;background:#f8f8f8;padding:20px;} .demo{height:1500px;} .float{width:200px;padding:5px 10px;border:1px solid #ffecb0;font-size:12px;background-color:#fffee0;-moz-box-shadow:1px 1px 2px rgba(0,0,0,.2);-webkit-box-shadow:1px 1px 2px rgba(0,0,0,.2);box-shadow:1px 1px 2px rgba(0,0,0,.2);position:absolute;-moz-border-radius:5px;-webkit-border-radius:5px;border-radius:5px;} .float .close-ico{position:absolute;top:5px;right:5px;display:block;width:16px;height:16px;} /* Head Fixed */ .fixed-top{position:fixed;bottom:auto;top:0px;} /* Foot Fixed */ .fixed-bottom{position:fixed;bottom:0px;top:auto;} /* Left Fixed */ .fixed-left{position:fixed;right:auto;left:0px;} /* RIGHT Fixed */ .fixed-right{position:fixed;right:0px;left:auto;} * html,* html body{background-attachment:fixed;} /* IE6 Head Fixed */ * html .fixed-top{position:absolute;bottom:auto;top:expression(eval(document.documentElement.scrollTop));} /* IE6 RIGHT Fixed */ * html .fixed-right{position:absolute;right:auto;left:expression(eval(document.documentElement.scrollLeft+document.documentElement.clientWidth-this.offsetWidth)-(parseInt(this.currentStyle.marginLeft,10)||0)-(parseInt(this.currentStyle.marginRight,10)||0));} /* IE6 Foot Fixed */ * html .fixed-bottom{position:absolute;bottom:auto;top:expression(eval(document.documentElement.scrollTop+document.documentElement.clientHeight-this.offsetHeight-(parseInt(this.currentStyle.marginTop,10)||0)-(parseInt(this.currentStyle.marginBottom,10)||0)));} /* IE6 Left Fixed */ * html .fixed-left{position:absolute;right:auto;left:expression(eval(document.documentElement.scrollLeft));} </style> <script type="text/javascript" src="https://www.jb51.net/jquery-1.6.2.min.js"></script> <script type="text/javascript"> /** * @author：愚人码头 * 类似于新浪微博新消息提示的定位框 */ (function($){ $.fn.capacityFixed = function(options) { var opts = $.extend({},$.fn.capacityFixed.deflunt,options); var FixedFun = function(element) { var top = opts.top; var right = ($(window).width()-opts.pageWidth)/2+opts.right; element.css({ "right":right, "top":top }); $(window).resize(function(){ var right = ($(window).width()-opts.pageWidth)/2+opts.right; element.css({ "right":right }); }); $(window).scroll(function() { var scrolls = $(this).scrollTop(); if (scrolls > top) { if (window.XMLHttpRequest) { element.css({ position: "fixed", top: 0 }); } else { element.css({ top: scrolls }); } }else { element.css({ position: "absolute", top: top }); } }); element.find(".close-ico").click(function(event){ element.remove(); event.preventDefault(); }) }; return $(this).each(function() { FixedFun($(this)); }); }; $.fn.capacityFixed.deflunt={ right : 100,//相对于页面宽度的右边定位 top:150, pageWidth : 960 }; })(jQuery); </script> </head> <body> <div></div> <div> <div> <p>1条新私信，<a href="#">查看私信</a></p> <p>108个新粉丝，<a href="#">查看粉丝</a></p> <a href="#" title="关闭">×</a> </div> </div> <script type="text/javascript"> $("#float").capacityFixed(); </script> </body> </html>