//栏目导航菜单伸缩通用函数
//Powered by sunrace
//FnShowSub(label,exppic,closeoth,closethpic);
//label－需要打开和关闭的层名
//exppic－交换节点图片名字
//closeoth－需要同时关闭的层名
//closethpic－同事关闭层的节点图片

var strImg_ExpandIcon = "/images/childpalace/jian1.gif";
var strImg_CollapseIcon = "/images/childpalace/jian1.gif";

function FnShowSub(label,exppic,closeoth,closethpic)
{
	if (label.style.display == "none")
	{
		label.style.display = "inline";
		exppic.src = strImg_ExpandIcon;

		//判断第三个参数是否关闭其他层
		  if (closeoth != null)
		    {
		    closeoth.style.display = "none";
		    closethpic.src = strImg_CollapseIcon;
		    }
	}
	else
	{
		label.style.display = "none";
		exppic.src = strImg_CollapseIcon;

		//判断第三个参数是否关闭其他层
		  if (closeoth != null)
		    {
		    closeoth.style.display = "inline";
		    closethpic.src = strImg_ExpandIcon;
		    }
	}
	return true;
}