請問我做的輪播圖，為什么只輪播了一下，而且第二章上面還出現(xiàn)了一個小圖標(biāo)。
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>京東輪播圖代碼</title>
</head>
<body>
<div class="slider" id="circle" ?style="width:790px; height:340px; overflow:hidden;">
<a ><img src="images/zp (1).jpg" alt="" /></a>
<a ><img src="images/zp (2).jpg" styly="width:790px; height:340px" alt="" /></a>
<ul class="circle">
<!--移動鼠標(biāo)觸發(fā)事件-->
<li onmouseover="lunbo(1)" id="1" >1</li>
<li onmouseover="lunbo(2)" id="2">2</li>
</ul>
<div class="arrow">
<a href="javaScript:;" class="arrow-l" onclick="bo2()" id="bo1"></a>
<a href="javaScript:;" class="arrow-r" onclick="bo1()" id="bo2"></a>
</div>
</div>
<script>
? ? var a = 1;
? ? var t = 0;
? ? window.onload = function(){
? ? t = setInterval("bo1()", 2000);
? ? }
function lunbo(num){
a = num;
var btn = document.getElementById("circle").getElementsByTagName("img")[0];
for (var i=1;i<3;i++) {
var li = document.getElementById("circle").getElementsByTagName("li")[i-1];
li.style.backgroundColor = "#3E3E3E";
?
if(num == i){
btn.src = "img/"+i+"p.jpg";
li.style.backgroundColor = "#B61B1F";
}
}
?
}
function bo1(){
if(a==2){
a = 1;
}
a++;
lunbo(a);
}
function bo2(){
if(a ==1){
a = 2;
}
a--;
lunbo(a);
}
</script>
</body>
</html>
