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/2010-1/17695">数学知识点汇编：三视图 </a>  下一篇：<a href="/News/2010-1/17697">高三地理“空间定位”复习学案 </a> ';
}