代码如下：
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> <style> *{ margin:0; padding:0; } #wrap{ width:800px; height:550px; background:#E9E8E8; margin:0 auto; position:relative; } #content{ width:750px; height:400px; background:#fff; margin:0 auto; border-radius: 15px; position:relative; overflow:hidden; } input:nth-of-type(1){ width:250px; height:30px; margin:20px 0 0 200px; } input:nth-of-type(2){ width:60px; height:33px; } .p{ height:30px; line-height:30px; position:absolute; top:0; left:770px; font-weight:900; font-size: 30px; } </style> </head> <body> <div> <div> </div> <input type="text" placeholder="一起来吐槽吧~"/> <input type="button" value="发送" /> </div> <script src="https://libs.baidu.com/jquery/1.9.1/jquery.js"></script> <script> $(function(){ $("#btn").click(function(){ var $value=$("#txt").val(); var $p=$("<p></p>"); $p.addClass("p"); $p.text($value); $("#txt").val("");//点击过后设置文本框内容为空 var _top=Math.floor(Math.random()*($("#content").innerHeight()-30)); var _fontsize=16+Math.floor(Math.random()*10); var _rgb="rgb(" + Math.floor(Math.random()*255)+"," + Math.floor(Math.random()*255)+"," + Math.floor(Math.random()*255)+")"; $p.css({"top":_top,"font-size":_fontsize,"color":_rgb}); $("#content").append($p); var _timer=Math.ceil(Math.random()*4000)+3000; $p.stop().animate({"left":"-500px"},_timer,function(){ $(this).remove(); }); }); }) </script> </body> </html>