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/2016-12/135827">辽宁省本溪满族自治县高级中学人教版化学必修二教案汇总 </a>  下一篇：<a href="/News/2016-12/135829">江苏省泰州中学高二化学（苏教版）选修四作业汇总 </a> ';
}