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/2010-3/22281">高考化学专题精练：综合计算 </a>  下一篇：<a href="/News/2010-3/22283">2010届高三政治二轮复习热点材料主观题汇编 </a> ';
}