HTML5商城开发四 多图或多商品的水平滚动展示

.horz_scroll { 
    float: left;
    width: 20px;
    height: 130px;
    padding-top: 100px;
    padding-left: 15px;
    padding-right: 15px;
    cursor: pointer;
}

    .horz_scroll:hover {
        background-color: #e9e9e9;
    } 

<script type="text/javascript">
    $(function () {
        //---- 设置标签图片滚动 ----//
        var scrollWidth = 170;//单个商品模块的宽度，包括外边距
        var scrollPos = 0;
        var scrollCurPos = 0;
        $("#horz_left").click(function () { 
            scrollCurPos = scrollPos;
            if (scrollPos >= scrollWidth) {
                scrollPos -= scrollWidth;
            }
            if (scrollPos < scrollWidth && scrollCurPos < scrollWidth) scrollPos = 0;
            $("#srcollTag").scrollLeft(scrollPos);
        });
        $("#horz_right").click(function () {
            var totalWidth = $("#srcollTag .product").length * scrollWidth - 800;//srcollTag的宽度800
            if (scrollPos < totalWidth) {
                scrollPos += scrollWidth;
                if (scrollPos > totalWidth) scrollPos = totalWidth + 20;//移动到最右再加右边距20
            }
            $("#srcollTag").scrollLeft(scrollPos);
        });
    });
</script>

<div class="active_dd active_dd_lg btop btm bg-white">
    <div class="horz_scroll" id="horz_left">
        <img src="Content/images/horz_left.png" alt="left" />
    </div>
    <div id="srcollTag" style="width: 800px;height:230px;float:left; overflow: hidden;">
        <div style="width:99999px;">
            <div class="product">
                <!-- 商品信息 -->
            </div> 
        </div>
    </div>
    <div class="horz_scroll" id="horz_right"><img src="Content/images/horz_right.png" alt="right" /> </div>
</div>