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/2021-1/193714">2020-2021高三数学（理）一轮复习课件 </a>  下一篇：<a href="/News/2021-1/193716">2020-2021高三通史版历史一轮课时跟踪 </a> ';
}