JS简单下拉框联动功能 JS实现的简单下拉框联动功能示例
Marx-link 人气:0想了解JS实现的简单下拉框联动功能示例的相关内容吗,Marx-link在本文为您仔细讲解JS简单下拉框联动功能的相关知识和一些Code实例,欢迎阅读和指正,我们先划重点:JS,下拉框联动,下面大家一起来学习吧。
本文实例讲述了JS实现的简单下拉框联动功能。分享给大家供大家参考,具体如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>www.qb5200.com JS下拉联动</title> <script> function setSecond(obj){ var val = obj.value; if(val == 'en'){ var sec = document.getElementById('second'); sec.innerHTML = "<option>one</option><option>two</option>"; }else{ var sec = document.getElementById('second'); sec.innerHTML = "<option>一</option><option>二</option>"; } } </script> </head> <body> <div> <select id="first" onchange="setSecond(this)"> <option value="en">en</option> <option value="zh">zh</option> </select> </div> <div> <select id="second"> </select> </div> </body> </html>
使用在线HTML/JS/css运行工具http://tools.softyun.net/code/HtmlJsRun,简单效果图如下:
使用innerHTML,IE浏览器不支持这种方法的,所以改进方法:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>www.qb5200.com JS下拉联动</title> <script> function setSecond(obj){ var val = obj.value; if(val == 'en'){ var sec = document.getElementById('second'); sec.options[0] = new Option("one","one"); sec.options[1] = new Option("two","two"); }else{ var sec = document.getElementById('second'); sec.options[0] = new Option("一","one"); sec.options[1] = new Option("二","two");//可设置循环配置,也可一个一个配置 } } </script> </head> <body> <div> <select id="first" onchange="setSecond(this)"> <option value="en">en</option> <option value="zh">zh</option> </select> </div> <div> <select id="second"> </select> </div> </body> </html>
可以兼容火狐,IE等
希望本文所述对大家JavaScript程序设计有所帮助。
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