jq三级联动

test.html

<div class="a_list">
<div class="a_title">商城分类：</div>
<div class="a_i">*</div>
<select style="margin-left: 20px" id="s_fenlei" name="s_fenlei" class="a_bendian">
<option value="">-请选择-</option>
{volist name='s_fenlei' id='s_fenlei'}
<option value="{$s_fenlei.id}">{$s_fenlei.name}</option>
{/volist}
</select>
<select id="s_fenlei1" name="s_fenlei1" class="a_bendian">
<option>-请选择-</option>
</select>
<select id="s_fenlei2" name="s_fenlei2" class="a_bendian">
<option>-请选择-</option>
</select>
</div>

test.js
//商城分类三级联动
$("#s_fenlei").change(function () { var fenlei = $('#s_fenlei').val();
if(fenlei==""){
$("#pinpai").hide();
}else{
$("#pinpai").show();
}
var list = '<option value="">-请选择-</option>';
var list1 = '<option value="">-请选择-</option>';
$.ajax({
url:"{:url('sgetfenlei')}",
data:{b_fen:fenlei},
type:'POST',
datatype:'TEXT',
success:function (d) {
//组成二级分类的select
if(d.data.pinpai.length==0){ $("#s_fenlei1").hide();
return false;
}else {
$("#s_fenlei1").show();
for(var i=0;i<d.data.fenlei2.length;i++){
list1 = list1+"<option value='"+d.data.fenlei2[i].id+"'>"+d.data.fenlei2[i].name+"</option>";
}
$("#s_fenlei1").html(list1); }
//组成品牌的select
if(d.data.pinpai.length==0){ $("#pinpai").hide();
return false;
}
for(var i=0;i<d.data.pinpai.length;i++){
list = list+"<option value='"+d.data.pinpai[i].brand_id+"'>"+d.data.pinpai[i].name+"</option>";
}
$("#brand").html(list);
}
});
});
$("#s_fenlei1").change(function () {
var fenlei = $('#s_fenlei1').val();
var list1 = '<option value="">-请选择-</option>';
$.ajax({
url:"{:url('sgetfenlei')}",
data:{b_fen:fenlei},
type:'POST',
datatype:'TEXT',
success:function (d) {
console.log(d);
if(d.data.pinpai.length==0){ $("#s_fenlei2").hide();
return false;
}else {
$("#s_fenlei2").show();
for(var i=0;i<d.data.fenlei2.length;i++){
list1 = list1+"<option value='"+d.data.fenlei2[i].id+"'>"+d.data.fenlei2[i].name+"</option>";
}
$("#s_fenlei2").html(list1); }
}
});
});