1.html代码：

<td width="80px;">科目名称:</td>
<td >
        <select id="accountitem" name="accountitem" class="easyui-combobox"  data-options="editable:false,panelHeight:'auto',
        onSelect: function(){getAccountnameList();},onLoadSuccess : function(){getAccountnameList();}">
                        <option value="01">2013第一季度</option>
                        <option value="02">2013第二季度</option>
                        <option value="03">2013第三季度</option>
        </select>
</td>
<td>账户名称:</td>
<td >
        <select id="accountname" name="accountname" class="easyui-combobox"   data-options="editable:false,panelHeight:'auto'"></select>
</td>

2.js代码

/* 动态加载账户名称 */
function getAccountnameList(){
     //获取下拉列表的选项值
     var id = $("#accountitem").combobox("getValue");  
     $('#accountname').combobox({
                url: '${ctx}/oa/fdr/accountnameList?id='+id,
                valueField: 'id',        //id是返回json字符串中的key,对应下拉列表值
                textField: 'name',     //name是返回json字符串中的key,对应下拉列表显示文本
                onLoadSuccess : function(record){
                        //默认选中第一项
                        $('#accountname').combobox('setValue',record[0].id); 
                 }
        });
        getCapitalsummary();
};
//json数据如下：
[{"group":"","id":"cwzhnhfsy","name":"农行","selected":true},
{"group":"","id":"cwzhnhpos","name":"工行","selected":false},
{"group":"","id":"cwzhjhlzl","name":"建行","selected":false},
{"group":"","id":"cwzhjnpos","name":"POS机","selected":false}]

/* 动态加载期初余额 */
function getCapitalsummary(){
        var accountname = $("#accountname").combobox("getValue");
        $.post('${ctx}/oa/fdr/capitalsummary',{accountname:accountname},function(data){
                //使用jquery动态给easyui-numberbox赋值
                $("#beginningbalance").numberbox('setValue', data.beginningbalance);
        },'json');
};
//json数据如下：
{"beginningbalance":0,"incomeamount":0,"spendingamount":0}