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/2017-4/142772">2017届高考物理二轮复习专题突破课件 </a>  下一篇：<a href="/News/2017-4/142774">2018版高考历史一轮总复习课件 </a> ';
}