<form action="#" name="myform">
<label>省</label><select name="provice" id="provice"><option value="-1">请输入省份</option></select>
<label>市</label><select name="city" id="city"><option value="-1">请输入城市</option></select>
<label>县</label><select name="locale" id="locale"><option value="-1">请输入区县</option></select>
</form>
2. 定义json数据源:
var jsonData = [{
treeNode : '请输入省份',
value : -1,
childNode : [{
treeNode : '请输入城市',
value : -1,
childNode : [{
treeNode : '请输入区县',
value : -1,
childNode : []
}]
}]
},{
treeNode : '北京',
value : 1,
childNode : [{
treeNode : '东城区',
value : 11,
childNode : []
},{
treeNode : '西城区',
value : 12,
childNode : []
}]
},{
treeNode : '广西壮族自治区',
value : 2601,
childNode : [{
treeNode : '南宁',
value : 6653,
childNode : [{
treeNode : '横县',
value : 10799,
childNode : []
}, {
treeNode : '宾阳县',
value : 10800,
childNode : []
}]
}]
}]
3. javascript代码:
function initCountry(){
var provice = $("#provice");
var city = $("#city");
var locale = $("#locale");
var proviceStr = "";
$.each(<span style="color:#FF0000;">jsonData</span>,function(index,items){
proviceStr += "<option value='"+jsonData[index].value+"'>"+jsonData[index].treeNode+"</option>";
});
provice.empty().append(proviceStr);
provice.bind("change",function(){
if($(this).find(":selected").attr("value") == -1){
city.empty().append("<option value='-1'>请输入区县</option>");
}
});
provice.bind("change",function(){
var cityStr = '';
var index = provice.find(":selected").index();
$.each(jsonData[index].childNode,function(index,items){
city.empty();
cityStr += "<option value='"+items.value+"'>"+items.treeNode+"</option>";
city.append(cityStr);
})
changeLocale();
});
city.bind("change",changeLocale);
function changeLocale(){
var localeStr = '';
var index = provice.find(":selected").index();
var index2 = city.find(":selected").index();
$.each(jsonData[index].childNode[index2].childNode,function(index,items){
locale.empty();
localeStr += "<option value='"+items.value+"'>"+items.treeNode+"</option>";
locale.append(localeStr);
})
if(localeStr == ''){
locale.empty();
locale.append("<option value='-11'>请输入区县</option>");
}
}
}
$(function(){
initCountry();
})