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/2010-3/19172">高中数学等差数列和等比数列专题练习 </a>  下一篇：<a href="/News/2010-3/19174">高考语文二轮专题复习学案：作文素材集萃 </a> ';
}