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/2019-2/172584">2018-2019学年高二物理上学期选修3-1课件+试题 </a>  下一篇：<a href="/News/2019-2/172586">2018-2019学年高二人教版物理选修3-2配套课件+试题+讲义 </a> ';
}