多级联动以地址为例

多级联动

效果展示

$(function(){    $(document).on("change",'.region',function(){        var _this=$(this);        var parent_id=_this.val()        var str="<select name='address[]' class='region'><option value='0'>请选择..<option>";        if(parent_id!=0){            $.get('?r=house/add',{"pid":parent_id},function(msg){                for(var i=0;i<msg.length;i++){                  str+="<option value='"+msg[i]['region_id']+"'>"+msg[i]['region_name']+"</option>";                }                if(msg!=""){                    str+="</select>";                    _this.nextAll().remove();                    _this.after(str);                }            },'json')        }else{           _this.nextAll().remove();     }    })