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/2012-9/53474">高考高分生理综复习秘籍及学习习惯揭秘 </a>  下一篇：<a href="/News/2012-9/53476">2013高考理综备战技巧：小题应“大做” </a> ';
}