Posted in Javascript onApril 03, 2013
效果展示：
页面初加载时： 
选择车类型后：
选择车颜色后：
JS实现下拉框的动态添加，网页代码如下：
<!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>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();
}
});
}); JS实现下拉框的动态添加(附效果)
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