Javascript控制图片滚动的效果_Javascript教程(2)_H5之家

横向的，第二个版本，加了兼容IE、FF、Opera的滤镜效果
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">
<html xmlns="">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<meta name="Author" content="番茄红了" />
<title>JS相册效果 -- 横向</title>
<style>
body {background:#000;margin:0;font:12px Verdana;text-align:center;}
#tbody {width:650px;margin:50px auto;}
#mainbody {width:640px;margin:5px;border:1px solid #222;padding:1px}
#mainphoto {cursor:pointer;display:block;}
#goleft {float:left;clear:left;margin:6px 5px 0 3px;}
#goright {float:right;clear:right;margin:6px 3px 0 5px;}
#photos {width:610px;height:54px;line-height:54px;border:1px solid #222;margin:10px 0;overflow:hidden;}
#showArea img {display:block;float:left;margin:1px 0;cursor:pointer;border:1px solid #222}
</style>
</head>
<body>
<div id="tbody">
    <div id="mainbody">
      <img src="" alt="番茄红了..." width="640" height="400" id="mainphoto" rel="" name="" />
    </div>
    <img src="" width="11" height="56" id="goleft" />
    <img src="" width="11" height="56" id="goright" />
    <div id="photos">
      <div id="showArea">
        
        <img src="" alt="番茄红了..." width="80" height="50" rel="" name="" />
        <img src="" alt="番茄红了..." width="80" height="50" rel="" name="" />
        <img src="" alt="番茄红了..." width="80" height="50" rel="" name="" />
        <img src="" alt="番茄红了..." width="80" height="50" rel="" name="" />
        <img src="" alt="番茄红了..." width="80" height="50" rel="" name="" />
        <img src="" alt="番茄红了..." width="80" height="50" rel="" name="" />
        <img src="" alt="番茄红了..." width="80" height="50" rel="" name="" />
        <img src="" alt="番茄红了..." width="80" height="50" rel="" name="" />
        <img src="" alt="番茄红了..." width="80" height="50" rel="" name="" />
        <img src="" alt="番茄红了..." width="80" height="50" rel="" name="" />
        <img src="" alt="番茄红了..." width="80" height="50" rel="" name="" />
        <img src="" alt="番茄红了..." width="80" height="50" rel="" name="" />
        <img src="" alt="番茄红了..." width="80" height="50" rel="" name="" />
        <img src="" alt="番茄红了..." width="80" height="50" rel="" name="" />
        <img src="" alt="番茄红了..." width="80" height="50" rel="" name="" />
      </div>
    </div>
</div>
</body>
</html>
<script language="javascript" type="text/javascript">
var browse = window.navigator.appName.toLowerCase();
var MyMar;
var speed = 1; //速度，越大越慢
var spec = 1; //每次滚动的间距, 越大滚动越快
var minOpa = 50; //滤镜最小值
var maxOpa = 100; //滤镜最大值
var spa = 2; //缩略图区域补充数值
var w = 0;
spec = (browse.indexOf("microsoft") > -1) ? spec : ((browse.indexOf("opera") > -1) ? spec*10 : spec*20);
function $(e) {return document.getElementById(e);}
function goleft() {$('photos').scrollLeft -= spec;}
function goright() {$('photos').scrollLeft += spec;}
function setOpacity(e, n) {
    if (browse.indexOf("microsoft") > -1) e.style.filter = 'alpha(opacity=' + n + ')';
    else e.style.opacity = n/100;
}
$('goleft').style.cursor = 'pointer';
$('goright').style.cursor = 'pointer';
$('mainphoto').onmouseover = function() {setOpacity(this, maxOpa);}
$('mainphoto').onmouseout = function() {setOpacity(this, minOpa);}
$('mainphoto').onclick = function() {location = this.getAttribute('name');}
$('goleft').onmouseover = function() {this.src = 'http://www.tblog.com.cn/test/images/goleft2.gif'; MyMar=setInterval(goleft, speed);}
$('goleft').onmouseout = function() {this.src = 'http://www.tblog.com.cn/test/images/goleft.gif'; clearInterval(MyMar);}
$('goright').onmouseover = function() {this.src = 'http://www.tblog.com.cn/test/images/goright2.gif'; MyMar=setInterval(goright,speed);}
$('goright').onmouseout = function() {this.src = 'http://www.tblog.com.cn/test/images/goright.gif'; clearInterval(MyMar);}
window.onload = function() {
    setOpacity($('mainphoto'), minOpa);
    var rHtml = '';
    var p = $('showArea').getElementsByTagName('img');
    for (var i=0; i<p.length; i++) {
        w += parseInt(p[i].getAttribute('width')) + spa;
        setOpacity(p[i], minOpa);
        p[i].onclick = function() {location = this.getAttribute('name');}
        p[i].onmouseover = function() {
            setOpacity(this, maxOpa);
            $('mainphoto').src = this.getAttribute('rel');
            $('mainphoto').setAttribute('name', this.getAttribute('name'));
            setOpacity($('mainphoto'), maxOpa);
        }
        p[i].onmouseout = function() {
            setOpacity(this, minOpa);
            setOpacity($('mainphoto'), minOpa);
        }
        rHtml += '<img src="' + p[i].getAttribute('rel') + '" width="0" height="0" alt="" />';
    }
    $('showArea').style.width = parseInt(w) + 'px';
    var rLoad = document.createElement("div");
    $('photos').appendChild(rLoad);
    rLoad.style.width = "1px";
    rLoad.style.height = "1px";
    rLoad.style.overflow = "hidden";
    rLoad.innerHTML = rHtml;
}
</script>