JQuery页面图片切换和新闻列表滚动效果的具体实现

最近用到一个页面上图片左右切换和新闻列表滚动呈现的效果，整理如下：

前段代码：

    .flash_img .img-box {
        position: absolute;
    }
    .flash_img .img-box li{float:left;}

    .flash_img img {
        display: block;
    }

    .flash_item {
        position: absolute;
        right: 510px;
        bottom: 10px;
        height: 12px;
    }

    .flash_item li {
        background:url(../images/flash_item.png) no-repeat right;
        color: #D94B01;
        cursor: pointer;
        float: left;
        font-size: 12px;
        height: 12px;
        line-height: 12px;
        margin-left: 15px;
        text-align: center;
        width: 12px;
    }

    .flash_item li.on
    {
        background-position:left;
        color: #FFFFFF;
        font-weight: bold;
        height: 12px;
        line-height: 12px;
        width: 12px;
    }

    .flash_item li img {
        display: block
    }   
/*default.css*/
.indexNews{width:700px; height:29px; bottom:0; left:50%; position:absolute; margin-left:-480px; z-index:999;}
.indexNews strong{color:#409dd9;float: left;}
.indexNews strong a{color:#409dd9;text-decoration:none;}
.indexNews .core{height:18px; line-height:18px; overflow:hidden;}
.indexNews .core span{color:#409dd9; margin-right:20px;}
.indexNews .core a{margin-left:10px;color:#666;}
.outer{height:440px;}

js文件夹包含三个文件：jquery-1.7.2.min.js、indexPic.js、kxbdSuperMarquee.js。第一个可以在网上直接下载，第二个是切换图片，第三个滚动新闻列表。

indexPic.js：

    $.fn.slideImg.scllor = function($this, settings) {
        var index = 0;
        var scllorer = $(".img-box li", $this);
        var size = scllorer.size();
        var slideW = scllorer.outerWidth();
        var $selItem = $("<ul></ul>", {
            "class": "flash_item",
            html: function() {
                var $selItemHTML = "";
                if (size == 1) {
                    return;
                } else if (size > 1) {
                    for (var i = 0; i < size; i++) {
                        i == 0 ? $selItemHTML += '<li class="on">' : $selItemHTML += '<li class=""></li>';
                    }
                    return $selItemHTML;
                }
            }
        }).appendTo($this);
        var li = $(".flash_item li", $this);
        var showBox = $(".img-box", $this);
        var intervalTime = null;
        li.hover(function() {
            var that = this;
            if (intervalTime) {
                clearInterval(intervalTime);
            }
            intervalTime = setTimeout(function() {
                index = li.index(that);
                ShowAD(index);
            }, 200);
        }, function() {
            clearInterval(intervalTime);
            interval();
        });
        showBox.hover(function() {
            if (intervalTime) {
                clearInterval(intervalTime);
            }
        }, function() {
            clearInterval(intervalTime);
            interval();
        });
        function interval() {
            intervalTime = setInterval(function() {
                ShowAD(index);
                index++;
                if (index == size) {
                    index = 0;
                }
            }, settings.timer);
        }
        interval();
        var ShowAD = function(i) {
            showBox.animate({ "left": -i * slideW }, settings.speed);
            li.eq(i).addClass("on").sibl