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/2020-6/186437">2021高考生物通用版一轮习题 </a>  下一篇：<a href="/News/2020-6/186439">2019-2020学年高中北师大版数学选修2-2学案 </a> ';
}