rails jquery的二级联动

wozhidao

$(function(){   $("#area_parentID").change(function(){       $("#next_select").html("<select name='streat' id='streat'></select>");       $.post(        "/banks/select_with_ajax",       {"parentID":$("#area_parentID").val()},       function(data){          var datas = eval(data);  //alert(datas);  $.each(datas,function(i){              $("<option value='"+datas[i].area.id+"'>"+datas[i].area.name+"</option>").appendTo($("#streat"));          });           });   });}); 
<tr><td>地域</td><td><%=   @areas = Area.find(:all, :select => 'name,id',:conditions=>"parentID=0").collect{|t| [t.name,t.id]}.insert(0,["请选择",0])         select("area","parentID",@areas,{},{:selected=>1})%><span id='next_select'><select name="streat" id="streat"></select></span></td></tr> 
def select_with_ajax                @areas = Area.find(:all, :select => "name,id",:conditions => ["parentID = ?", params[:parentID]])                    render(:json => @areas.to_json,:layout => false)  end 
刚弄的rails+jquery的二级联动,记性不好,在这记下来