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/2015-8/112652">高中数学精选题（80）代数式的最值 </a>  下一篇：<a href="/News/2015-8/112654">2016高考数学一轮复习，这五大误区一定要避免！ </a> ';
}