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/2018-3/158247">2018版高中英语外研版必修一学案 </a>  下一篇：<a href="/News/2018-3/158249">2017-2018学年高一人教版化学必修二学案 </a> ';
}