var columnsId = "";//定义一个变量用于存放栏目Id
if(oneColumnsId!=null && twoColumnsId!=null && threeColumnsId!=null)
{
	columnsId = threeColumnsId;
}
else if(oneColumnsId!=null && twoColumnsId!=null)
{
	columnsId = twoColumnsId;
}
else
{
	columnsId = oneColumnsId;
}
//以二级栏目取详细信息
new rewinjson.rewinAjax("/dcjj/jsp/public/detailInfo.jsp", 
				new rewinjson.tool.parameter("json","columnsId="+columnsId+"","",""),
				rewinjson.client.detailInfoText,
				"POST",
				"rewinjson_detailInfo"
				);