最简单的图片轮播

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script type="text/javascript">
    var arr = new Array;
    arr[0] = "../images/slide-01.jpg";
    arr[1] = "../images/slide-02.jpg";
    arr[2] = "../images/slide-03.jpg";
    var Timer = setInterval(play, 1000);
    var count = 1;
    function play() {
        if (arr.length == count)
            count = 0;
        document.getElementById("pic").src = arr[count];
        count++;
    }
    function clearTimer() {
        clearInterval(Timer);
    }

    function onMouseOver(obj) {
        clearTimer();
        var index = parseInt(obj.value);
        document.getElementById("pic").src = arr[index - 1];
        count = index;
    }
    function btnMouseOut() {
        Timer = setInterval(play, 1000);
    }
    function init() {
        var btns = document.getElementsByTagName("input");
        for (var i = 0; i < btns.length; i++) {
            btns[i].onmouseout = btnMouseOut;
        }
    }
</script>
</head>
<body onload="init()">
<img id="pic" src="../images/slide-01.jpg" width="600" height="315" alt=""/><br />
<input type="button" value="1" id="1" onmouseover="onMouseOver(this)"/>
<input type="button" value="2" id="2" onmouseover="onMouseOver(this)" />
<input type="button" value="3" id="3" onmouseover="onMouseOver(this)" />

</body>
</html>

转载原文：http://blog.csdn.net/wjr_loves/article/details/7865537