function removeSelect(){
var mySelect = document.getElementById("mySelect");
mySelect.parentNode.removeChild(mySelect);
}
function $(id)
{
return document.getElementById(id)
}
function show()
{
var selectObj=$("area")
var myOption=document.createElement("option")
myOption.setAttribute("value","10")
myOption.appendChild(document.createTextNode("上海"))
var myOption1= Element. ("option")
myOption1.setAttribute("value","100")
myOption1.appendChild(document.createTextNode("南京"))
selectObj.appendChild(myOption)
}
函數choice()
{
var index=$("area").selectedIndex;
var val=$("區域").options[index].getAttribute("value")
if(val==10)
{
var i=$("context") .childNodes.length-1;
var remobj=$("context").childNodes[i];
remobj.removeNode(true)
var sh=document.createElement("select")
sh.add(new Option("浦東新區","101"))
sh.add( new Option("黃浦區","102"))
sh.add(new Option("徐匯區","103"))
sh.add(new Option("普陀區","104 ") ") "))
$("context").appendChild(sh)
}
if(val==100)
{
var i=$("context" ). childNodes.高度-1;
var remobj=$("context").childNodes[i];
remobj.removeNode(true)
var nj=document.createElement("select")
var nj=document.createElement("select")
nj.add(new Option("玄武區","201"))
nj.add( new Option("白下區","202"))
nj.add(new Option( "下關區","203"))
nj.add(new Option("棲霞區", "204"))
$("context").appendChild(nj)
}
}
function calc()
{
var x=$("context") .childNodes.length-1;
alert(x)
}
函數刪除( )
{
var i=$("context").childNodes.length-1
var remobj=$("context").childNodes[i]
remobj.removeNode(true)
}
;
change="choice()"上選擇id="area" >
選擇>
身體>
根據這些東西,自己用JQEURY AJAX JSON實作了一個小功能如下: