document.getElementById("louyuming").options[0].selected=true; function jsSelectIsExitItem(objSelect, objItemValue) { var isExit = false; for (var i = 0; i < objSelect.options.length; i++) { if (objSele
<%@ 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"><h
js函数方法: <script> function getDefaultSelectedOption(selectId, valIfNull) { var selectId = selectId.replace(/^#/, ''), opts; try { opts = document.getElementById(selectId).getElementsByTagName('option'); for (var i in opts) { if (opts[i].defaultSelect
jQuery获取Select选择的Text和Value:语法解释:1. $("#select_id").change(function(){//code...}); //为Select添加事件,当选择其中一项时触发2. var checkText=$("#select_id").find("option:selected").text(); //获取Select选择的Text3. var checkValue=$("#select
server.txt内容如下: 阿里云服务器 关于应用场景,就不多说了,字符串是不论是后端开发还是前端开发等,都是要经常打交道了. test.js(node.js代码,只要被本地装了node.js环境,直接可通过node test.js运行看效果): var fs = require("fs"); var result = fs.readFileSync("./server.txt"); console.log("result:"+result)