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/2017-11/151393">2017-2018学年高中历史岳麓版必修3习题 </a>  下一篇：<a href="/News/2017-11/151395">2017-2018学年高中历史岳麓版必修3课件 </a> ';
}