天易18----jquery实现文本框失去焦点效果
一：效果图预览：
1)默认：
2）当点击姓名文本框或密码文本框时，效果如下图：
3）当点击内容文本区域时，效果图如下：
二：代码如下：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <base href="<%=basePath%>"> <title></title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">--><script type="text/javascript" src="<%=basePath %>js/jquery-1.4.4.min.js"></script><script type="text/javascript">$(document).ready(function(){$(':input').focus(function(){$(this).addClass("focus");if($(this).val()==this.defaultValue){$(this).val("");}}).blur(function(){if($(this).val()==""){$(this).val(this.defaultValue);}$(this).removeClass("focus");}); });</script> <style type="text/css">*{padding:0;margin:0;}body {font-size:12px;font-family:"宋体";}form {width:500px;position:absolute;top:50%;left:50%;;margin:-70px 0 0 -250px;}fieldset {border:2px solid #458B00;padding:12px;}legend {font-size:15px;font-weight:bold;padding:10px;color:green;}div {padding:5px 0;}label {color:green;}input {height:25px;border:1px solid #A2B5CD;width:200px;font-size:12px;font-family:"宋体";padding:0px;color:green;}textarea {width:200px;height:100px;border:1px solid #A2B5CD;font-size:12px;font-family:"宋体";padding:5px;vertical-align:middle;color:green;}.focus {border:1px solid green;background:#eee;}</style> </head><body><form action="" method="post"><fieldset><!-- 这个标签表示设置边框 --><legend>个人信息</legend><div><label for="username">姓名：</label><input type="text" id="usrename" value="天成"></div><div><label for="pass">密码：</label><input type="password" id="pass" value="123"></div><div><label for="content">内容：</label><textarea id="content">内容</textarea></div></fieldset></form></body></html>