我能说JS和jquery有时候都有病吗？同样的代码，重敲一遍可以了，再过一会不行了。再试一下重敲，一模一样的代码，也不报错。就是不行。反复折腾。。。。
我帖上来的是经过了1个小时同等功能的测试OK的，无语了。。。。。
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html><head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>Insert title here</title> <link type="text/css" rel="stylesheet" href="../css/style.css"> <script type="text/javascript" src="../js/jquery-1.8.3.min.js"></script> <script type="text/javascript" src="../ckeditor/ckeditor.js"> </script> <script type="text/javascript"> $(document).ready(function(){ //供应商输入框判断 /* 焦点离开文本框 */ $("#proName").blur(function(){ if($("#proName").val().length==0){ $("#proName_span").html("供应商不能为空"); } }); $("#proName").focus(function(){ $("#proName").css("background-color","#FFFFCC"); $("#proName_span").html(""); }); //联系人为空输入框判断 /* 焦点在文本框内*/ $("#proContact").focus(function(){ $("#proContact").css("background-color","#FFFFCC"); $("#proContact_span").html(""); }); /!* 焦点离开文本框 *!/ $("#proContact").blur(function(){ $("#proContact").css("background-color","#D6D6FF"); if($(this).val().length==0){ $("#proContact_span").html("联系人不能为空"); } }); //联系电话为空输入框判断 /!* 焦点在文本框内*!/ $("#proPhone").focus(function(){ $("#proPhone").css("background-color","#FFFFCC"); $("#proPhone_span").html(""); }); /* 焦点离开文本框 */ $("#proPhone").blur(function(){ $("#proPhone").css("background-color","#D6D6FF"); if($(this).val().length==0){ $("#proPhone_span").html("联系电话不能为空"); } }); }) </script> </head> <body> <div class="main"> <div class="optitle clearfix"> <div class="title">供应商管理>></div> </div> <form id="form1" name="form1" method="post" action="<%=request.getContextPath()%>/addProvider"> <input type="hidden" name="method" value="add"> <div class="content"> <table class="box"> <tbody><tr> <td class="field">供应商名称：</td> <td><input type="text" name="proName" class="text" id="proName" value=""/> <span color="red">*</span><span color="red" id="proName_span"></span></td> </tr> <tr> <td class="field">联系人：</td> <td><input type="text" name="proContact" class="text" id="proContact" value=""/> <span color="red">*</span><span color="red" id="proContact_span"></span></td> </tr> <tr> <td class="field">联系电话：</td> <td><input type="text" name="proPhone" class="text" id="proPhone" value=""/> <span color="red">*</span><span color="red" id="proPhone_span"></span></td> </tr> <tr> <td class="field">联系地址：</td> <td><input name="proAddress" id="proAddress" class="text" value=""/></td> </tr> <tr> <td class="field">传真：</td> <td><input type="text" name="proFax" class="text" id="proFax" value=""/> </td> </tr> <tr> <td class="field">描述：</td> <td><textarea id="proDesc" name="proDesc" rows="8" cols="5" class="ckeditor"></textarea></td> </tr> </tbody></table> </div> <div class="buttons"> <input type="button" name="add" id="add" value="保存" class="input-button"/> <input type="button" name="button" id="button" onclick="history.back(-1)" value="返回" class="input-button"/> </div> </form> </div> <script type="text/javascript" src="../js/provider/add.js"></script> </body></html>