实现弹出框传值到页面。。。急急急！！求指导，谢谢

Question

<div id="sckty" class="easyui-window" title="选择出库类型" data-options="modal:true,closed:true,iconCls:'icon-save'" style="width:210px;padding:10px;height:250px;">  
<input id="fmdpyId" type="hidden"/>
<ul class="easyui-tree" id="ck" data-options="url:'jquery-easyui/demo/tree/tree_data1.json',animate:true" >
 <li>
                    <span>出库类型</span>
                    <ul>
                        <li>主营</li>
                        <li>其他</li>
                        
                    </ul>
                </li>
</ul></div>
function xzCk(id){     $('#fmdpyId').val(id);
       alert(1);
       
       
//出库类型选择
$('#sckty').window('open');
var a=document.getElementById("ck")
}