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/2010-3/22267">高三生物二轮复习《生命活动的调节》教案 </a>  下一篇：<a href="/News/2010-3/22269">高考语文难点汇总：词语 </a> ';
}