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/2012-11/57983">高中数学破题技法之"三角开门 八面玲珑" 2 </a>  下一篇：<a href="/News/2012-11/57985">增加膳食纤维摄入有助改善腰部线条 </a> ';
}