javascript中select操作

yuyee · 发表于 2013-2-7 15:49:11

几个对象的获取
var obj = document.getElementById(”select_id”); //selectid

var index = obj.selectedIndex; // 选中索引

var text = obj.options[index].text; // 选中文本

var value = obj.options[index].value; // 选中值

小操作，玩玩
<%@ 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><script type="text/javascript">function getResult(){var obj=document.getElementById("province").options;for(var i=0;i<obj.length;i++){alert(obj[i].text);}alert("11");var username=document.getElementById("username");var password=document.getElementById("pwd");if(username.value=="" && password.value==""){alert("空");}}</script></head><body><form name="f" > <fieldset> <legend>用户注册</legend> <div> <label for="username">帐号</label> <input type="text" id="username" name="username" /> </div> <div> <label for="pwd">密码</label> <input type="password" name="pwd" id="pwd" /> </div> <div> <label for="province">省份</label> <select id="province" name="province" > <option value="10">江西</option> <option value="11">福建</option> <option value="12">广东</option> <option value="13">浙江</option> </select> </div> </fieldset> <input type="submit" value="提交" name="btnSub" /></form></body></html>

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javascript中select操作

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