Ajax在线提交留言并实时显示的js代码[修正版]

学习Ajax提交的朋友，不妨参考一下吧，从中你会明白一些技巧吧。
因代码本身的问题，脚本之家已经修正，欢迎大家测试。

<！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> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>Ajax留言本</title> <style type="text/css"> * { padding: 0; margin: 0; } li { list-style: none; } body { background: #f9f9f9; font-size: 14px; } #explain { height: 60px; border-bottom: 1px solid #999999; background: #eee; font-size: 14px; color: #666; text-align: center; line-height: 60px; } #explain a { color: #990000; font-weight: bold; text-decoration: none; border-bottom: 1px dotted #990000; } #explain a:hover { border-bottom: 2px solid #990000; } #explain strong { color: #990000; } #box { width: 450px; padding: 10px; border: 1px solid #ccc; background: #f4f4f4; margin: 10px auto; } #fill_in { margin-bottom: 10px; } #fill_in li { padding: 5px 0; } #fill_in .text { width: 380px; height: 30px; padding: 0 10px; border: 1px solid #ccc; line-height: 30px; font-size: 14px; font-family: arial; } #fill_in textarea { width: 380px; height: 100px; line-height: 20px; padding: 5px 10px; border: 1px solid #ccc; font-size: 14px; font-family: arial; overflow: auto; vertical-align: top; } #fill_in .btn { border: none; width: 100px; height: 30px; border: 1px solid #ccc; background: #fff; color: #666; font-size: 14px; position: relative; left: 42px; } #message_text { display: none; } #message_text h2 { font-size: 14px; padding: 6px 0 4px 10px; background: #ddd; border-bottom: 1px solid #ccc; } #message_text li { background: #f9f9f9; border-bottom: 1px solid #ccc; color: #666; overflow: hidden; } #message_text h3 { padding: 10px; font-size: 14px; line-height: 24px; } #message_text p { padding: 0 10px 10px; text-indent: 28px; line-height: 20px; } </style> <script type="text/javascript"> var oBtn = null; var oForm = null; var oText = null; var oTextarea = null; var timer = null; var speed = 0; var oLi = null var oH3 = null; var oP = null; window.onload = function（） { oBtn = document.getElementById（"btn"）; oBtn.onclick = getValue; }; function getValue（） { document.getElementById（"message_text"）.style.display = "block"; oForm = document.getElementsByTagName（"form"）[0]; oText = document.getElementById（"text"）; oTextarea = document.getElementsByTagName（"textarea"）[0]; oUl = document.getElementById（"message_text"）.getElementsByTagName（"ul"）[0]; oForm.onsubmit = function（）{ return false; }; if（ oText.value == "" || oTextarea.value == "" ） { alert（"就二个框，你还不写全了啊？"）; return; } oLi = document.createElement（"li"）; oH3 = document.createElement（"h3"）; oP = document.createElement（"p"）; oH3.innerHTML = oText.value; oP.innerHTML = oTextarea.value; if（oUl.childNodes[0]） { oUl.insertBefore（oLi,oUl.childNodes[0]）; } else { oUl.appendChild（oLi）; } oLi.appendChild（oH3）; oLi.appendChild（oP）; oText.value = ""; oTextarea.value = ""; var h = oLi.offsetHeight; oLi.style.height = "0px"; if（timer） { clearInterval（timer）; } timer = setInterval（"goTime（"+h+"）", 35）; goTime（h）; } function goTime（target） { var top = oLi.offsetHeight; speed += 3; top += speed; if（top > target） { top = target; speed *= -0.7; } if（top===target && Math.abs（speed） < 3） { clearInterval（timer）; timer = null; oLi.style.height = target + "px"; } oLi.style.height = top + "px"; } </script> </head> <body>不妨多提交几次留言试试看……<ul id="fill_in"> <form> <li>姓名：<input id="text" type="text" class="text" /></li> <li>内容：<textarea id="content" style="width:300px; height:100px"></textarea></li> <li><input id="btn" type="submit" value="提交" class="btn" /></li> </form> </ul><h2>显示留言</h2> <ul></ul> </body> </html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]