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/2012-8/51894">浙江省义乌三中高三物理课件《匀速圆周运动》 </a>  下一篇：<a href="/News/2012-8/51896">高中地理行星地球资料汇总 </a> ';
}