window.onload?=?function(){
	var?container?=?document.getElementById("container"),
		list?=?document.getElementById("list"),
		btn?=document.getElementById("btn").getElementsByTagName("span"),
		prev?=?document.getElementById("prev"),
		next?=?document.getElementById("next"),
		index?=?1,
		animated?=?false,
		timer;
		
	//圓點(diǎn)的函數(shù)
	function?showButton(){
		//清除圓點(diǎn)屬性
		for(var?i?=?0;?i?<?btn.length;?i++){
			if(btn[i].className?==?'on'){
				btn[i].className?=?'';
				break;
			}
		}
		btn[index?-?1].className?=?'on';
	}
	//點(diǎn)擊圓點(diǎn)切換圖片
	for(var?i?=?0;?i?<?btn.length;?i++){
		btn[i].onclick?=?function(){
			//條件成立，退出函數(shù)，后面的將不執(zhí)行
			if(this.className?==?'on'){
				return;
			}
			//獲取當(dāng)前點(diǎn)擊的index值
			var?myIndex?=?parseInt(this.getAttribute('index'));
			var?offset?=?-960?*?(myIndex?-?index);
			animate(offset);
			index?=?myIndex;
			if(!animated){
				showButton();
			}
		}
	}
	//封裝點(diǎn)擊箭頭切換圖片的函數(shù)
	function?animate(offset){

		animated?=?true;
		var?newLeft?=?parseInt(list.style.left)?+?offset;
		var?time?=?300;		//位移總時(shí)間
		var?interval?=?5;		//位移間隔時(shí)間
		var?speed?=?offset/(time/interval);??//每次位移量
		
		function?go(){
			if(speed?<?0?&&?parseInt(list.style.left)?>?newLeft?||?speed?>?0?&&?parseInt(list.style.left)?<?newLeft){
				list.style.left?=?parseInt(list.style.left)?+?speed?+?"px";
				setTimeout(go,interval);
			}else{
				animated?=?false;
				list.style.left?=?newLeft?+?"px";
				//無(wú)限滾動(dòng)
				if(newLeft?>?-960){
					list.style.left?=?-4800?+?"px";
				}
				if(newLeft?<?-4800){
					list.style.left?=?-960?+?"px";
				}
			}
		}
			go();
	}
	
	//自動(dòng)切換函數(shù)
	function?play(){
		timer?=?setInterval(function(){
			next.onclick();
		},1500);
	}
	//清除定時(shí)器
	function?stop(){
		clearInterval(timer);
	}
	
	//點(diǎn)擊右箭頭
	next.onclick?=?function(){
		if(!animated){
		if(index?==?5){
			index?=?1;
		}else{
			index?+=?1;
		}
		showButton();
			animate(-960);
		}
	}
	//點(diǎn)擊左箭頭
	prev.onclick?=?function(){
		if(!animated){
		if(index?==?1){
			index?=?5;
		}else{
			index?-=?1;
		}
		showButton();
			animate(960);
		}
	}
	container.onmouseover?=?stop;
	container.onmouseout?=?play;
	play();
}

這里有個(gè)bug求解，點(diǎn)擊圓點(diǎn)圖片跳轉(zhuǎn)沒(méi)問(wèn)題，但是不會(huì)高亮，要點(diǎn)兩次才會(huì)亮起來(lái)，，求解