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/2018-8/165134">2019新优化高考化学一轮（全国通用版）课件+讲义+练习 </a>  下一篇：<a href="/News/2018-8/165136">2019届高考一轮复习历史（通史）课件+练习 </a> ';
}