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/2017-4/142297">2016-2017学年历史人民版必修3素材 </a>  下一篇：<a href="/News/2017-4/142299">高一历史人民版必修一专题 </a> ';
}