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/2010-5/26076">生物必修3导学案 </a>  下一篇：<a href="/News/2010-5/26078">山东省泰安市2010届高三二模 </a> ';
}