js取得表单里面所有注册信息 _JavaScript

js获得表单里面所有注册信息
<html>

<head>

<title>测试程序</title>
<script language="javascript" type="text/javascript">
    
    window.onload = function(){
  
        /*写入18--100的年龄到select标签里面*/
        for(var age = 18; age <= 100; age ++){
            var cretoption = document.createElement("option");
            cretoption.text = age+"岁";
            cretoption.value = age+"岁";   
            $("stuAge").add(cretoption);
        }
          
    }
    
    /*点击注册按钮*/
    function zcstu(){
        
        /*获得用户姓名*/
        var stu_name = $("stuName").value    
        
        /*获得用户性别*/
        var stu_sex = "男";
        if(!$("stuSex").checked){
            stu_sex = "女";
        }
        
        /*获得年龄*/
        var stu_ages = $("stuAge");
        var stu_age;
        stu_age = stu_ages.options[stu_ages.selectedIndex].value;
        
        /*获得爱好*/
        var stu_hobby="";  
        var stu_hobbys = document.getElementsByName("stuhobby");
        for(var i = 0; i < stu_hobbys.length; i ++){
            if(stu_hobbys[i].checked){
                stu_hobby+=stu_hobbys[i].value+" ";
            }
        }
        /*获得密码和确认密码*/
        var stu_password = $("stuPW").value;
        var stu_password_d = $("stuPWd").value;
        
        /*把注册信息构建成html代码块*/
        var ihzc = "姓名："+stu_name+"<br/>"+
                   "性别："+stu_sex+"<br/>"+
                   "年龄："+stu_age+"<br/>"+
                   "爱好："+stu_hobby+"<br/>"+
                   "密码："+stu_password;
        
        $("zcxx").innerHTML = ihzc;
        
        return false;
        
    }
    
    function $(uid){
        return document.getElementById(uid);
    }
    
    
</script>
</head>

<body>

<form action="#" >
    姓名：<input type="text" id="stuName"/><br/>
    性别：<input type="radio" value="男" id="stuSex" name="stuSex" checked="checked"/>男
          <input type="radio" value="女" id="stuSex" name="stuSex"/>女<br/>
    年龄：<select id="stuAge">
            <option value="10岁" id="stuAge1">10岁</option>
          </select><br/>
    爱好：<label><input type="checkbox" value="野游" name="stuhobby" id="stuhobby">野游</label>
          <label><input type="checkbox" value="逛街" name="stuhobby" id="stuhobby">逛街</label>
          <label><input type="checkbox" value="交友" name="stuhobby" id="stuhobby">交友</label>
          <label><input type="checkbox" value="下棋" name="stuhobby" id="stuhobby">下棋</label>
          <label><input type="checkbox" value="其他" name="stuhobby" id="stuhobby">其他</label><br/>
    输入密码：<input type="password" id="stuPW"/><br/>
    确认密码：<input type="password" id="stuPWd"/><br/>
    
    <input type="submit" value="注册" id="subzc" onclick="return zcstu()"/><input type="reset" value="重置"/>
</form>

<div id="zcxx"></div>

</body>

</html>