原生js实现二级联动菜单
(编辑:jimmy 日期: 2024/11/27 浏览:3 次 )
本文实例为大家分享了js二级联动菜单的具体代码,供大家参考,具体内容如下
效果如下:
代码如下:
<!DOCTYPE html> <html> <head> <meta charset="utf-8" /> <title>二级联动菜单</title> <style> *{ padding: 0px; margin: 0px; } form{ width: 300px; height: 300px; margin: 10px auto; } form select{ width: 140px; height: 50px; text-align: center; line-height: 30px; font-size: 20px; } </style> <script> var x = ["请选择...","美食","景点","电影"]; var y = [ ["请选择..."], ["黄焖鸡","油焖大虾","红烧肉","东坡肉"], ["黄山","泰山","嵩山","华山"], ["烈日灼心","逆战","无间道","黑金"] ]; window.onload = init; function init(){ var chose1 = document.getElementById("chose1"); var chose2 = document.getElementById("chose2"); chose1.length = x.length; for(var i = 0;i<x.length;i++) { chose1.options[i].text = x[i]; } var index = 0; chose2.length = y[index].length; for(var j = 0;j<y[index].length;j++) { chose2.options[j].text = y[index][j]; } } function change(obj){ var chose2 = document.getElementById("chose2"); chose2.length = y[obj].length; for(var j = 0;j<y[obj].length;j++) { chose2.options[j].text = y[obj][j]; } } </script> </head> <body> <form> <select id="chose1" onchange="change(this.selectedIndex)"></select> <select id="chose2"></select> </form> </body> </html>
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