new Option("文本","值",true,true).后面两个true分别表示默认被选中和有效! //js默认选中 var sel = document.getElementsByClassName("project_type")[0]; sel.options.length=0;//清空 sel.options.add(new Option("请选择","0")); $.each(res,func
<html> <head> <script> window.onload = function(){ var opts = document.getElementById("select"); var value = 2//这个值就是你获取的值; if(value!=""){ for(var i=0;i<opts.options.length;i++){ if(value==opts.options[i].value){ o
function checkAll(checktop){ $(":checkbox[name='id']").prop("checked",checktop.checked); //$("#checkOrCancelAll").prop("checked",$(":checkbox[name='id']").length==$(":checkbox[name='id']:checked"
#coding=utf-8 from selenium import webdriver from selenium.webdriver.common.by import By from selenium.webdriver.support import expected_conditions as EC from selenium.webdriver.support.wait import WebDriverWait base_url = "http://www.baidu.com"