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/2015-12/118671">高中生如何正确刷题备战高考 </a>  下一篇：<a href="/News/2015-12/118673">怎样提高高考物理复习效率    </a> ';
}