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/2017-6/145781">上海市崇明区横沙中学高二数学学案 </a>  下一篇：<a href="/News/2017-6/145783">高二历史岳麓版选修二同步练习 </a> ';
}