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/2010-2/18092">河北省唐山市09-10学年度高二上学期期末考试 </a>  下一篇：<a href="/News/2010-2/18094">2010届高三物理寒假基础知识巩固练习汇总 </a> ';
}