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/2007-7/2934">新人教-生物[选修3]&nbsp;同步练习汇总 </a>  下一篇：<a href="/News/2007-7/2936">新人教-政治[必修2]&nbsp;同步练习汇总 </a> ';
}