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/2017-4/141741">2018届高考生物总复习补上一课 课件 </a>  下一篇：<a href="/News/2017-4/141743">2018届高考生物总复习考点加强课 课后分层训练 </a> ';
}