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/2018-1/156055">2017-2018学年高中化学鲁科版选修五课件+试题+教学案 </a>  下一篇：<a href="/News/2018-1/156057">2017-2018学年高中英语译林版必修四文档 </a> ';
}