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/2009-12/16214">深圳中学地理资料 </a>  下一篇：<a href="/News/2009-12/16216">生物：《稳态与环境》期末过关检测 </a> ';
}