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/2020-1/181468">2019-2020学年新课标版高中物理选修3-1课件+练习 </a>  下一篇：<a href="/News/2020-1/181470">2020版新素养同步外研版高中英语必修四课件+练习 </a> ';
}