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/2009-1/9300">【化学】基本概念、理论命题特点及复习策略 </a>  下一篇：<a href="/News/2009-1/9302">【图文】谨防“教师依赖症” </a> ';
}