jQuery仿腾讯超实用的图片新闻组图幻灯效果

效果图：

效果图1.png

效果图2.png

HTML代码：

CSS样式：

@charset "utf-8";
body {
    font-size: 12px;
    font-family: "宋体", Arial, sans-serif;
    color: #343434;
    background: #000;
}

html,
body,
div,
span,
p,
h1,
h2,
h3,
h4,
h5,
h6,
em,
img,
strong,
sub,
sup,
tt,
dd,
dl,
dt,
form,
label,
table,
caption,
tbody,
tfoot,
thead,
tr,
th,
td,
ul,
li,
p,
a {
    margin: 0;
    padding: 0;
}

.cbody988 {
    margin: 0 auto;
    width: 988px;
    position: relative;
}

.cbody937 {
    margin: 0 auto;
    width: 937px;
    position: relative;
    padding-left: 7px;
}

input,
select,
textarea,
img {
    vertical-align: middle;
}

img {
    border: 0;
}

ul,
li {
    list-style-type: none;
}

a:link,
a:visited {
    text-decoration: none;
    color: #343434;
}

a:hover {
    text-decoration: underline;
    color: #0F6BD0;
}

.overhide {
    overflow: hidden;
    text-indent: -100em;
}


/*位置属性*/

.marTop10 {
    margin-top: 10px;
}

.left {
    float: left;
}

.right {
    float: right;
}

.clear {
    clear: both;
}

.clearfix:after {
    clear: both;
    content: '';
    display: block;
    font-size: 0;
    line-height: 0;
    visibility: hidden;
    width: 0;
    height: 0;
}

.clearfix {
    display: +inline-block;
}


/*header*/

#header {
    border-bottom: 1px solid #383838;
    height: 46px;
    position: relative;
    line-height: 46px;
    color: #FFFFFF;
}


#header span {
    position: absolute;
    right: 10px;
    top: 0px;
    color: #9A9A9A;
    font-size: 12px;
    font-weight: normal;
}

#header span a {
    color: #9A9A9A;
    margin: 0 3px;
}


/*wrapper*/

#wrapper {
    width: 960px;
    margin: 0 auto;
}

#picSlideWrap {
    background: #F5F8FD;
    border: 1px solid #A9BFD6;
    padding-bottom: 30px;
}




.imgnav {
    width: 788px;
    margin: 10px auto;
}


.imgnav {
    position: relative;
    margin: 0 auto;
    width: 788px;
}

#img {
    z-index: 10;
    width: 788px;
    position: relative;
    text-align: center;
}

#img img {
    height: 570px;
    display: none;
    border: 4px solid #000;
}

#prev {
    position: absolute;
    left: 0px;
    top: 0px;
    z-index: 10;
    cursor: pointer;
    width: 394px;
    height: 578px;
    background: url(../images/ico/blank.gif);
}

#prev a {
    position: absolute;
    left: 20px;
    top: 224px;
    display: block;
    background: url(../images/ico/imgSlideLeft.png) no-repeat;
    width: 104px;
    height: 104px;
    display: none;
}

#next {
    position: absolute;
    right: 0px;
    top: 0px;
    z-index: 10;
    cursor: pointer;
    width: 394px;
    height: 578px;
    background: url(../images/ico/blank.gif);
}

#next a {
    position: absolute;
    right: 20px;
    top: 224px;
    display: block;
    background: url(../images/ico/imgSlideRight.png) no-repeat;
    width: 104px;
    height: 104px;
    display: none;
}

#btns {
    background: #EAEBF0;
    position: relative;
    height: 122px;
    border: 1px solid #D6D9DC;
    margin-top: 12px;
}

#btns ul {
    position: relative;
    width: 10000px;
    height: 122px;
}

#btns ul li {
    float: left;
    padding: 8px 3px 3px 3px;
    width: 116px;
    height: 86px;
    cursor: pointer;
    text-align: center;
    margin-right: 20px;
    position: relative;
}

#btns ul li img {
    width: 116px;
    height: 86px;
    display: block;
}

#btns ul li tt {
    background: #000;
    color: #FFF;
    position: absolute;
    right: 4px;
    bottom: 4px;
    z-index: 20;
    font-family: "宋体";
    font-size: 12px;
    line-height: 16px;
    padding: 0 5px;
}

#btns li.hov {
    background: url(../images/ico/imgHoverBg.gif) no-repeat;
}

.ctrl div {
    clear: both;
}

#cSlideUl {
    width: 690px;
    height: 116px;
    overflow: hidden;
    position: relative;
    top: 10px;
    margin: 0 auto;
}

.picSildeLeft {
    cursor: pointer;
    position: absolute;
    top: 32px;
    left: 10px;
    z-index: 9;
}

.picSildeRight {
    cursor: pointer;
    position: absolute;
    top: 32px;
    right: 10px;
    z-index: 9;
}

jQuery代码：

$(function() {
                var index = 0;
                var length = $("#img img").length;
                var i = 1;

                //关键函数：通过控制i ，来显示图片
                function showImg(i) {
                    $("#img img")
                        .eq(i).stop(true, true).fadeIn(800)
                        .siblings("img").hide();
                    $("#btns li")
                        .eq(i).addClass("hov")
                        .siblings().removeClass("hov");
                }

                function slideNext() {
                    if(index >= 0 && index < length - 1) {
                        ++index;
                        showImg(index);
                    } else {
                        if(confirm("已经是最后一张,点击确定重新浏览！")) {
                            showImg(0);
                            index = 0;
                            aniPx = (length - 5) * 142 + 'px'; //所有图片数 - 可见图片数 * 每张的距离 = 最后一张滚动到第一张的距离
                            $("#cSlideUl ul").animate({
                                "left": "+=" + aniPx
                            }, 200);
                            i = 1;
                        }
                        return false;
                    }
                    if(i < 0 || i > length - 5) {
                        return false;
                    }
                    $("#cSlideUl ul").animate({
                        "left": "-=142px"
                    }, 200)
                    i++;
                }

                function slideprev() {
                    if(index >= 1) {
                        --index;
                        showImg(index);
                    }
                    if(i < 2 || i > length + 5) {
                        return false;
                    }
                    $("#cSlideUl ul").animate({
                        "left": "+=142px"
                    }, 200)
                    i--;
                }
                $("#img img").eq(0).show();
                $("#btns li").eq(0).addClass("hov");
                $("#btns tt").each(function(e) {
                    var str = (e + 1) + "/" + length;
                    $(this).html(str)
                })

                $(".picSildeRight,#next").click(function() {
                    slideNext();
                })
                $(".picSildeLeft,#prev").click(function() {
                    slideprev();
                })
                $("#btns li").click(function() {
                    index = $("#btns li").index(this);
                    showImg(index);
                });
                $("#next,#prev").hover(function() {
                    $(this).children("a").fadeIn();
                }, function() {
                    $(this).children("a").fadeOut();
                })
            })

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