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/2021-5/198061">2021-2022学年新教材人教版生物必修1学案 </a>  下一篇：<a href="/News/2021-5/198063">2021-2022学年新教材人教B版数学必修第一册课后作业+章末测评+微专题强化练 </a> ';
}