JS实现下拉框的动态添加
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JS实现下拉框的动态添加,网页代码如下:
- <SPAN style="FONT-SIZE: 14px"><!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>动态添加下拉框</title>
- <script type="text/javascript" src="../JS文件/jquery.js"></script>
- <script type="text/javascript" src="../JS文件/SelectMenu2.js" charset=“utf-8”></script>
- </head>
- <body>
- <form action="#">
- <br />
- <br />
- <br />
- <div class="CarInfo">
- <span class="CarType">车类型:
- <select >
- <option value="请选择" selected="selected">请选择</option>
- <option value="宝马">宝马</option>
- <option value="奔驰">奔驰</option>
- </select>
- </span>
- <span class="CarColor" style="display:none">车颜色:
- <select>
- </select>
- </span>
- <span class="CarWheel" style="display:none">车轮:
- <select>
- </select>
- </span>
- </div>
- </form>
- </body>
- </html></SPAN>
JS代码如下:
- // JavaScript Document
- $(document).ready(function (){
- var CarTypeSelect = $(".CarType").children("select");
- var CarColorSelect = $(".CarColor").children("select");
- var CarWheelSelect = $(".CarWheel").children("select");
- //给第一个下拉框的SelectChanged时间编码
- CarTypeSelect.change(function (){
- //取得当前下拉框的值
- var CarTypeValue = $(this).val();
- //当第一个下拉框内容改变的时候,第三个下拉框要隐藏起来
- CarWheelSelect.parent().hide();
- if(CarTypeValue !="")
- {
- CarColorSelect.html("");
- $("<option value = ''>请选择</option>").appendTo(CarColorSelect);
- switch(CarTypeValue){
- case "宝马":
- var CarColor=["绿色","黑色"];
- for(var i = 0;i<CarColor.length;i++){
- $("<option value='"+CarColor[i]+"'>" + CarColor[i] + "</option>").appendTo(CarColorSelect);
- }
- break;
- case "奔驰":
- var CarColor = ["白色","红色"];
- for(var i = 0;i<CarColor.length;i++){
- $("<option value='"+CarColor[i]+"'>" + CarColor[i] + "</option>").appendTo(CarColorSelect);
- }
- break;
- }
- CarColorSelect.parent().show();
- }
- else
- {
- CarColorSelect.parent().hide();
- }
- });
- CarColorSelect.change(function (){
- var CarColorValue = $(this).val();
- CarWheelSelect.html("");
- if(CarColorValue != "")
- {
- CarWheelSelect.html("");
- $("<option value = ''>请选择</option>").appendTo(CarWheelSelect);
- switch(CarColorValue){
- case "绿色":
- var CarWheel = ["绿钢","绿碳纤维"];
- for(var i = 0;i<CarWheel.length;i++){
- $("<option value='"+CarWheel[i]+"'>" + CarWheel[i] + "</option>").appendTo(CarWheelSelect);
- }
- break;
- case "红色":
- var CarWheel = ["红钢","红碳纤维"];
- for(var i = 0;i<CarWheel.length;i++){
- $("<option value='"+CarWheel[i]+"'>" + CarWheel[i] + "</option>").appendTo(CarWheelSelect);
- }
- break;
- case "黑色":
- var CarWheel = ["黑钢","黑碳纤维"];
- for(var i = 0;i<CarWheel.length;i++){
- $("<option value='"+CarWheel[i]+"'>" + CarWheel[i] + "</option>").appendTo(CarWheelSelect);
- }
- break;
- case "白色":
- var CarWheel = ["白钢","白碳纤维"];
- for(var i=0;i<CarWheel.length;i++){
- $("<option vaiue='"+CarWheel[i]+"'>" + CarWheel[i] + "</option>").appendTo(CarWheelSelect);
- }
- break;
- }
- CarWheelSelect.parent().show();
- }
- else
- {
- CarWheelSelect.parent().hide();
- }
- });
- });
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