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/2020-6/186246">2019-2020学年数学北师大版必修4学案汇总 </a>  下一篇：<a href="/News/2020-6/186248">甘肃省定西市岷县第二中学2019-2020学年高一下学期期中考试 </a> ';
}