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/2012-11/57742">高中数学：中等生应怎样提高数学成绩2 </a>  下一篇：<a href="/News/2012-11/57745">备战高考：数学易错易混考点2 </a> ';
}