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/2010-4/24388">新课标生物人教版必修3同步学案 </a>  下一篇：<a href="/News/2010-4/24390">高二单元测试精选 </a> ';
}