<body onload="onload()">
<form id="form1" runat="server">
<div>
<input type="hidden" id="H_IncomeCode" runat="server" size="110"/>
在后台
int iId=0;//for tree id
设置节点时
iId++;
node.ID =iId.ToString();
节点是否选中时
H_IncomeCode.Value += node.ID.ToString() + ",";