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/2018-5/162402">2018届高考化学三轮冲刺选择题精选试题 </a>  下一篇：<a href="/News/2018-5/162404">2018-2019学年高中新创新一轮复习理数通用版课件 </a> ';
}