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/2010-3/20640">【荐】2010生物一轮课件 </a>  下一篇：<a href="/News/2010-3/20642">【大纲版】2010届高三生物一轮复习课件 </a> ';
}