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/2021-8/201231">北京市延庆区2020-2021学年高一下学期期中考试 </a>  下一篇：<a href="/News/2021-8/201233">2021-2022高考物理一轮定基础精品汇编试题专题练 </a> ';
}