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/2009-4/11615">高三数学复习之30分钟小练习 </a>  下一篇：<a href="/News/2009-4/11617">高三化学二轮复习专题课件 </a> ';
}