var ID="";
var value=getParameter('treedocid');
var sql ="SELECT * FROM tlk_frm_tree where ID='"+value+"'";
var datas = queryBySQL(sql);
for (var iter = datas.iterator(); iter.hasNext();) {       
var data = iter.next();       
ID = data.getItemValueAsString("cname");
}
ID;
其中"cname" 为表中需要查找的字段名