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/2010-3/21605">高考化学专题复习：有机物的组成、结构和性质 </a>  下一篇：<a href="/News/2010-3/21607">高三数学综合练习汇总 </a> ';
}