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/2016-8/129817">优化课堂2016秋数学人教A版（必修1+必修3）练习+章末检测 汇总 </a>  下一篇：<a href="/News/2016-8/129819">优化课堂2016秋数学北师大版必修4课件 汇总 </a> ';
}