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/2017-8/148378">【备课优选】2017秋高中物理人教版选修3-1课件汇总 </a>  下一篇：<a href="/News/2017-8/148380">2017粤教版高中物理必修二课件 </a> ';
}