老师为什么我按照代码写的，结果却很不一样呢？代码如下：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<script>
var yan;
/***********验证码的生成***************/
function YZM(){
//4位随机整数
yan = Math.floor(Math.random()*9000+1000);
//获得span对象
var span = document.getElementById("yzm_span");
span.innerText = yan;
}
/************提取公部分***************/
function check(id,reg){
//获取对应id的value
var uid = document.getElementById(id);
var val = uid.value;
//获取alt属性
var alt = uid.alt;
//获得span对象
var span = document.getElementById(id+"_span");]
if(val == null || val == ""){
span.innerText = "×"+alt+"不能为空";
span.style.color = "red";
return false;
}else if(reg.test(val)){
span.innerText = "√"+alt+"合法";
span.style.color = "green";
return true;
}else{
span.innerText = "×"+alt+"不合法";
span.style.color = "red";
return false;
}
}
/**********检验用户名的方法******************/
function checkName(){
//汉字的正则表达式
var reg=/^[\u4e00-\u9fa5]{3,5}$/;
return check("uname",reg);
}
/*********校验邮箱方法**************/
function checkEmail(){
//邮箱的正则表达式
var reg=/^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/;
return check("email",reg);
}
/*********检验密码方法**************/
function checkPwd(){
//密码的正则表达式
var reg=/^\d{3,6}$/;
return check("pwd",reg);
}
/*********检验手机号方法**************/
function checkPhone(){
//手机号的正则表达式
var reg=/^\d{11}$/;
return check("phone",reg);
}
/***********性别校验***************/
function checkSex(){
//获取所有性别对象
var sex = document.getElementById("sex");
//获取span对象
var span = document.getElementById("sex_span");
for(var i in sex){
if(sex[i].checked){
span.innerHTML = "性别选择成功"
span.style.color = "green";
return true;
}
}
span.innerHTML = "请选择性别";
span.style.color = "red";
return false;
}
/***********爱好校验***************/
function checkHob(){
//获取所有爱好对象
var hob = document.getElementById("hobby");
//获取span对象
var span = document.getElementById("hobby_span");
for(var i in hob){
if(hob[i].checked){
span.innerHTML = "爱好选择成功"
span.style.color = "green";
return true;
}
}
span.innerHTML = "请选择爱好";
span.style.color = "red";
return false;
}
/*********籍贯校验***********/
function checkAdress(){
var sel=document.getElementById("sel").value;
var span =document.getElementById("sel_span");
if(sel==0){
span.style.color="red";
span.innerText="请选择籍贯"
return false;
}else {
span.style.color="green";
span.innerText="籍贯选择成功"
return true;
}
}
/**********验证码输入校验************/
function checkYZM(){
//获取自己输入的验证码
var yzm = document.getElementById("yzm").value;
//获取span对象
var span = document.getElementById("yzm2_span");
if(yzm==yan){
span.innerText = "验证码正确";
span.style.color = "green";
return true;
}else{
span.innerText = "验证码错误";
span.style.color = "red";
return false;
}
}
/***********是否同意协议************/
function checkAgr(){
//同意框
var check = document.getElementById("check");
//提交
var sub = document.getElementById("sub");
sub.disabled = !check.checked;
}
function zong(){
var flag = checkName()&&checkPwd()&&checkPhone()&&checkEmail()&&checkSex()&&checkAdress()&&checkYZM();
return flag;
}
/*
*
* 正则表达式：
*
* 正则表达式是对于数据格式进行一定的规范限制
*
*
* ^：开始
* [0-9] [a-z A-Z] :数字 字母
*
* {2,4} ：段域 至少是2位 最多是4位
* {3}:指定范围就是3位
* {2,}:至少是2位
* $:结束
*
* \d：[0-9]
*
* \w[0-9 a-z A-Z]
*
* */
</script>
</head>
<body onload="YZM()">
<center>
<h3>注册页面</h3>
<hr />
<form action="" method="get" onsubmit="return zong()">
<table>
<tr height="35px">
<td width="150px">用户名：</td>
<td width="400px">
<input type="text" name="uname" id="uname" value="" alt="用户名" onblur="checkName()"/>
<span id="uname_span">*用户名必须是3-5位的汉字</span>
</td>
</tr>
<tr height="35px">
<td>密码：</td>
<td>
<input type="password" name="pwd" id="pwd" value="" alt="密码" onblur="checkPwd()"/>
<span id="pwd_span"></span>
</td>
</tr>
<tr height="35px">
<td>手机号：</td>
<td>
<input type="text" name="phone" id="phone" value="" alt="手机号" onblur="checkPhone()"/>
<span id="phone_span"></span>
</td>
</tr>
<tr height="35px">
<td>邮箱：</td>
<td>
<input type="text" name="email" id="email" value="" alt="邮箱" onblur="checkEmail()"/>
<span id="email_span"></span>
</td>
</tr>
<tr height="35px">
<td>性别：</td>
<td>
男：<input type="radio" name="sex" id="sex" value="0" onblur="checkSex()"/>
女：<input type="radio" name="sex" id="sex" value="1" onblur="checkSex()"/>
<span id="sex_span"></span>
</td>
</tr>
<tr height="35px">
<td>爱好：</td>
<td>
<input type="checkbox" name="hobby" id="hobby" value="1" onblur="checkHob()"/>唱歌
<input type="checkbox" name="hobby" id="hobby" value="2" onblur="checkHob()"/>跳舞
<input type="checkbox" name="hobby" id="hobby" value="3" onblur="checkHob()"/>溜冰<br />
<input type="checkbox" name="hobby" id="hobby" value="4" onblur="checkHob()"/>LOL
<input type="checkbox" name="hobby" id="hobby" value="5" onblur="checkHob()"/>爬山
<input type="checkbox" name="hobby" id="hobby" value="6" onblur="checkHob()"/>旅游
<span id="hobby_span"></span>
</td>
</tr>
<tr height="35px">
<td>籍贯：</td>
<td>
<select name="address" id="sel" onchange="checkAdress()">
<option value="0">--请选择--</option>
<option value="1">北京</option>
<option value="2">上海</option>
<option value="3">南京</option>
<option value="4">杭州</option>
</select>
<span id="sel_span"></span>
</td>
</tr>
<tr height="35px">
<td>验证码：</td>
<td>
<input type="number" name="" id="yzm" value="" onblur="checkYZM()"/>
<span id="yzm_span"></span>
<span id="yzm2_span"></span>
</td>
</tr>
<tr height="35px">
<td>个人介绍：</td>
<td>
<textarea name="intro" rows="8" cols="30"></textarea>
</td>
</tr>
<tr height="35px">
<td colspan="2" align="center">
<input type="checkbox" name="" id="check" value="" onclick="checkAgr()"/>是否同意本公司协议
</td>
</tr>
<tr height="35px">
<td colspan="2" align="center">
<input type="submit" name="" id="sub" value="注册" disabled="true"/>
</td>
</tr>
</table>
</form>
</center>
</body>
</html>
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