combobox select .change onSelect事件觸發

我現在要完成的功能是：
有兩個下拉框，當地一個下拉框選擇了第一個選項時，第二個下拉框不可用，否則就可用。

用了jQuery easyUI提供的onSelect方法。
如下：js文件：
$('#select1id').combobox({
                                url:"getClose.do",
                                editable:false,
                                panelWidth:130,
                                width:130,
                                onSelect:function(record){
                                        var peo = $('#closeBugChoose').combobox('getValue');
                                        
                                        if(peo=="1"){
                                                $('#select2id').combobox({
                                                        disabled:true
                                                });
                                        }
                                        else{
                                                $('#select2id').combobox({
                                                        disabled:false
                                                });
                                        }
                                }
                        });

這樣就可以了。