function chkdiv(divid){
	var chkid=document.getElementById(divid);
	if(chkid != null){return true; }
	else {return false; }	
}
if (chkdiv('fy')){
	document.getElementById('fy').innerHTML='上一篇：<a href="/News/2013-8/72337">北大优秀生学习方法：每个牛人都是“蜗牛” </a>  下一篇：<a href="/News/2013-8/72339">新高三家长该做的四件事 </a> ';
}