js设置select选中，如何通过js让select默认选中
创新互联建站 坚持“要么做到，要么别承诺”的工作理念，服务领域包括：网站制作、做网站 、企业官网、英文网站、手机端网站、网站推广等服务，满足客户于互联网时代的光山网站设计 、移动媒体设计的需求，帮助企业找到有效的互联网解决方案。努力成为您成熟可靠的网络建设合作伙伴！
创新互联公司 于2013年开始，先为元宝等服务建站，元宝等地企业，进行企业商务咨询服务。为元宝企业网站制作PC+手机+微官网三网同步一站式服务解决您的所有建站问题。
本文目录一览 1，如何通过js让select默认选中 $("select").val("选择3");“选择3”是对应要默认选中的值
在 js 中获取select元素，设定该元素的selectedindex值即可
2，js怎么给select 选中某一项 $("select").val(" ");括号里面填写值
这个html自带的select控件是无法实现的，两种方案，要么你直接移除那个选项，要么你直接使用div+css+js自己重写一个类似于select的控件
3，js如何控制select标签哪个被选中 selected="selected"这样写
在你的servlet或者action中通过out对象把查询的结果print出来。例如out.println(""); if(userlist!=null)out.flush();out.close();然后在页面上通过js的回调方法把第2个下拉框的设置为输出的东西
4，怎么用js动态 设置select中的某个值为选中值 补充,在form表单里加入这一段代码
ssss aaa ccc ssss
form1.aa.innerHTML = "************";
就可以了，这里form1是form标签的name属性值。
5，网站中js想动态设置select标签选中的值怎么弄 很简单 通过document.getELementById("你的select标签id").value=你数据库的值即可 有疑问可以call 我 本人q 345032463
使用ajax访问后台数据库获取数据然后根据获取的内容再局部更新select标签内容
1 2 1 2 1 2 1 2
基本
文件
流程
错误
SQL
调试
请求信息 : 2026-05-13 00:35:08 HTTP/1.1 GET : /article/ejecio.html 运行时间 : 2.2991s ( Load:0.0022s Init:0.0010s Exec:0.0354s Template:2.2604s ) 吞吐率 : 0.43req/s 内存开销 : 469.71 kb 查询信息 : 12 queries 5 writes 文件加载 : 36 缓存信息 : 0 gets 0 writes 配置加载 : 130 会话信息 : SESSION_ID=0j831r3t942aq3ejpouqndbl77
/home/wwwroot/bluegullmedia/wwwroot/index.php ( 1.09 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/ThinkPHP.php ( 4.61 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Think.class.php ( 12.26 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Storage.class.php ( 1.37 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Storage/Driver/File.class.php ( 3.52 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Mode/common.php ( 2.82 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Common/functions.php ( 53.56 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Hook.class.php ( 4.01 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/App.class.php ( 13.49 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Dispatcher.class.php ( 14.79 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Route.class.php ( 13.36 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Controller.class.php ( 11.23 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/View.class.php ( 7.59 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Behavior/BuildLiteBehavior.class.php ( 3.68 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Behavior/ParseTemplateBehavior.class.php ( 3.88 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Behavior/ContentReplaceBehavior.class.php ( 1.91 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Conf/convention.php ( 11.15 KB ) /home/wwwroot/bluegullmedia/wwwroot/App/Common/Conf/config.php ( 2.16 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Lang/zh-cn.php ( 2.55 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Conf/debug.php ( 1.49 KB ) /home/wwwroot/bluegullmedia/wwwroot/App/Home/Conf/config.php ( 0.31 KB ) /home/wwwroot/bluegullmedia/wwwroot/App/Home/Common/function.php ( 3.33 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Behavior/ReadHtmlCacheBehavior.class.php ( 5.62 KB ) /home/wwwroot/bluegullmedia/wwwroot/App/Home/Controller/ArticleController.class.php ( 6.02 KB ) /home/wwwroot/bluegullmedia/wwwroot/App/Home/Controller/CommController.class.php ( 1.60 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Model.class.php ( 60.11 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Db.class.php ( 32.43 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Db/Driver/Pdo.class.php ( 16.74 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Cache.class.php ( 3.83 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Cache/Driver/File.class.php ( 5.87 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Template.class.php ( 28.16 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Template/TagLib/Cx.class.php ( 22.40 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Template/TagLib.class.php ( 9.16 KB ) /home/wwwroot/bluegullmedia/wwwroot/App/Runtime/Cache/Home/7540f392f42b28b481b30614275e4e55.php ( 18.20 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Behavior/WriteHtmlCacheBehavior.class.php ( 0.97 KB ) /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Behavior/ShowPageTraceBehavior.class.php ( 5.24 KB )
[ app_init ] --START-- Run Behavior\BuildLiteBehavior [ RunTime:0.000019s ] [ app_init ] --END-- [ RunTime:0.000095s ] [ app_begin ] --START-- Run Behavior\ReadHtmlCacheBehavior [ RunTime:0.000110s ] [ app_begin ] --END-- [ RunTime:0.000157s ] [ view_parse ] --START-- [ template_filter ] --START-- Run Behavior\ContentReplaceBehavior [ RunTime:0.000123s ] [ template_filter ] --END-- [ RunTime:0.000181s ] Run Behavior\ParseTemplateBehavior [ RunTime:2.258814s ] [ view_parse ] --END-- [ RunTime:2.258930s ] [ view_filter ] --START-- Run Behavior\WriteHtmlCacheBehavior [ RunTime:0.000203s ] [ view_filter ] --END-- [ RunTime:0.000269s ] [ app_end ] --START--
1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') LIMIT 1' at line 1
[ SQL语句 ] : SELECT `id`,`pid`,`navname` FROM `cx_nav` WHERE ( id= ) LIMIT 1 1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') LIMIT 1' at line 1
[ SQL语句 ] : SELECT `id`,`navname` FROM `cx_nav` WHERE ( id= ) LIMIT 1 1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1
[ SQL语句 ] : SELECT `id`,`navname` FROM `cx_nav` WHERE ( pid= ) [8] Undefined index: pid /home/wwwroot/bluegullmedia/wwwroot/App/Home/Controller/ArticleController.class.php 第 47 行. [2] mkdir(): Permission denied /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Cache/Driver/File.class.php 第 59 行. [2] mkdir(): Permission denied /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Cache/Driver/File.class.php 第 59 行. [8] Undefined index: db_host /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Db.class.php 第 120 行. [8] Undefined index: db_port /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Db.class.php 第 121 行. [8] Undefined index: db_name /home/wwwroot/bluegullmedia/wwwroot/ThinkPHP/Library/Think/Db.class.php 第 122 行.
2.2991s
