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/2012-11/56899">高三数学算法知识点总结之输入、输出语句和赋值语句 </a>  下一篇：<a href="/News/2012-11/56901">高考数学复习“三步”走 </a> ';
}