function $(obj){return document.getElementById?document.getElementById(obj):null;}
//Get A ObjectArray By ObjectTagName

//按钮导航条
function ChangeDiv(N,K,it){
	for(i=1;i<N+1;i++){
		$(it+"t_"+i).className="n";
		$(it+"b_"+i).className="n";
	}
	$(it+"t_"+K).className="y";
	$(it+"b_"+K).className="y";
}

//设置新闻页内容大中小
function setSize(cname,sizename){
	var ccontent=document.getElementById(cname);
	ccontent.className=ccontent.className.split(" ")[0]+" "+sizename;
}