function?$(id){
	return?typeof?id?===?"string"?document.getElementById(id):id;
}
var?timer?=?null;
var?index?=?0;

window.onload?=?tab;
//這兩行放外面會(huì)報(bào)錯(cuò)，
//Uncaught?TypeError:?Cannot?read?property?'getElementsByTagName'?of?null
tab.js:13?
//Uncaught?TypeError:?Cannot?read?property?'length'?of?undefined
var?titles?=?$('notice-title').getElementsByTagName('li');
var?divs?=?$('notice-con').getElementsByTagName('div');
function?tab(){
	
	//手動(dòng)切換
	for?(var?i?=?0;?i?<?titles.length;?i++)?{
		titles[i].id?=?i;
		titles[i].onmouseover?=?function(){
			clearInterval(timer);
			//?for?(var?j?=?0;?j?<?titles.length;?j++)?{
			//?	titles[j].className?=?"";
			//?	divs[j].style.display?=?"none";
			//?};
			//?this.className?=?"select";
			//?divs[this.id].style.display?=?"block";
			changeIndex(this.id);
		}
		titles[i].onmouseout?=?function(){
			clearInterval(timer);
			timer?=?setInterval(changeTab,2000);
		}
	};
	//自動(dòng)切換頁切
	timer?=?setInterval(changeTab,2000);
	//?定義好的changeTab函數(shù)
	function?changeTab(){
		//?var?titles?=?$('notice-title').getElementsByTagName('li');
		//?var?divs?=?$('notice-con').getElementsByTagName('div');
		index++;
		if(index>=titles.length){
			index?=?0;
		}
		//?其他樣式去掉高亮
		changeIndex(index);
	}
	function?changeIndex(curIndex){
		for?(var?i?=?0;?i?<?titles.length;?i++)?{
			titles[i].className?=?"";
			divs[i].style.display?=?"none";
		};
		//高亮顯示標(biāo)簽
		titles[curIndex].className?=?"select";
		divs[curIndex].style.display?=?"block";
	}
}