HTML的select控件美化

CSS：

.div-select
{
    border: solid 1px #999;
    height: 40px;
    line-height: 40px;
    cursor: default;
}

.div-select-text
{
    float: left;
    background-color: #fff;
    height: 100%;
    word-break: keep-all;
    overflow: hidden;
    cursor: default;
}

    .div-select-text > div
    {
        padding: 3px;
    }

.div-select-arrow
{
    background-color: #fff;
    float: right;
    width: 40px;
    height: 100%;
    color: #999;
    cursor: default;
}

    .div-select-arrow > div
    {
        border: solid 1px #999;
        margin: 2px;
        height: 34px;
        background-color: #f2f2f2;
        text-align: center;
        line-height: 34px;
        font-size: 22px;
    }

.div-select-list
{
    position: absolute;
    top: 100px;
    left: 100px;
    border: solid 1px #999;
    max-height: 300px;
    overflow: auto;
    background-color: #9f9;
    display: none;
}

    .div-select-list .div-select-item:nth-child(2n+1)
    {
        background-color: #fff;
    }

.div-select-item
{
    height: 50px;
    line-height: 50px;
    padding-left: 3px;
    padding-right: 3px;
    background-color: #f2f2f2;
    word-break: keep-all;
    overflow: hidden;
    cursor: default;
}

    .div-select-item:hover
    {
        background-color: #d2d9f7!important;
    }

.div-select-selected
{
    background-color: #3399ff !important;
}

JS：

//2015年2月8日
//select美化
$(function () {
    $("select[class=‘div-select‘]").each(function () {
        var select = $(this);

        if (select.next("div").find(".div-select-list").length == 0) {
            select.after(‘<div><div class="div-select"><div class="div-select-text"><div></div></div><div class="div-select-arrow"><div>∨</div></div></div><div class="div-select-list"></div></div>‘);
        }

        var div = select.next("div");
        var divText = div.find(".div-select-text");
        var divSelect = div.find(".div-select");
        var divArrow = div.find(".div-select-arrow");
        var list = div.find(".div-select-list");

        function updateText(item) {
            divText.find("div").html(item.html());
        }

        select.find("option").each(function () {
            var option = $(this);
            var text = option.html();
            var value = option.attr("value");
            list.append(‘<div class="div-select-item" value="‘ + value + ‘">‘ + text + ‘</div>‘);
            list.find(".div-select-item").click(function () {
                var item = $(this);
                var value = item.attr("value");
                select.val(value);
                div.find(".div-select-selected").removeClass("div-select-selected");
                item.addClass("div-select-selected");
                updateText(item);
                list.hide();
            });
        });

        if (select.attr("width")) {
            divSelect.width(select.attr("width") - 2);
            divText.width(divSelect.width() - divArrow.width());
            if (select.attr("width") > list.width()) {
                list.width(divSelect.width());
            }
        }
        else {
            divSelect.width(list.width() + divArrow.width());
            divText.width(divSelect.width() - divArrow.width());
            list.width(divSelect.width());
        }

        div.keydown(function (e) {
            if (e.keyCode == 40) {
                var currentSelected = div.find(".div-select-selected");
                var nextSelected = currentSelected.next(".div-select-item");
                if (nextSelected.length == 0) {
                    nextSelected = list.find(".div-select-item:first");
                    nextSelected.addClass("div-select-selected");
                    currentSelected.removeClass("div-select-selected");
                    list.scrollTop(0);
                } else {
                    nextSelected.addClass("div-select-selected");
                    currentSelected.removeClass("div-select-selected");
                    var i = 0;
                    while (nextSelected.position().top < 0
                        || nextSelected.position().top > list.height() - nextSelected.height()) {
                        list.scrollTop(list.scrollTop() + nextSelected.height());
                        if (i++ > 100) break;
                    }
                }
                updateText(nextSelected);
                return false;
            }
            if (e.keyCode == 38) {
                var currentSelected = div.find(".div-select-selected");
                var nextSelected = currentSelected.prev(".div-select-item");
                if (nextSelected.length == 0) {
                    nextSelected = list.find(".div-select-item:last");
                    nextSelected.addClass("div-select-selected");
                    currentSelected.removeClass("div-select-selected");
                    list.scrollTop(list.find(".div-select-item").length * nextSelected.height());
                }
                else {
                    nextSelected.addClass("div-select-selected");
                    currentSelected.removeClass("div-select-selected");
                    var i = 0;
                    while (nextSelected.position().top < 0
                        || nextSelected.position().top > list.height() - nextSelected.height()) {
                        list.scrollTop(list.scrollTop() - nextSelected.height());
                        if (i++ > 100) break;
                    }
                }
                updateText(nextSelected);
                return false;
            }
            if (e.keyCode == 13) {
                list.hide();
            }
        });

        divSelect.click(function () {
            if (list.css("display") == "none") {
                list.show();
            }
            else {
                list.hide();
            }

            if (divSelect.offset().top + divSelect.height() + 2 + list.height() + 2 >
                $(window).scrollTop() + $(window).height()) {
                list.css("top", $(window).scrollTop() + $(window).height() - list.height() - 2);
            }
            else {
                list.css("top", divSelect.offset().top + divSelect.height() + 1);
            }
            if (list.offset().top < 0) {
                list.css("top", 0);
            }

            var currentSelected = div.find(".div-select-selected");
            if (currentSelected.position().top > list.height() - currentSelected.height()) {
                list.scrollTop(currentSelected.position().top - currentSelected.height() * 2);
            }
            return false;
        });
        list.css("top", divSelect.offset().top + divSelect.height() + 1);
        list.css("left", divSelect.offset().left);

        $("html,body").click(function (a) {
            list.hide();
        });
        list.click(function () {
            return false;
        });

        function initSelect() {
            var matchItem = list.find(".div-select-item[value=‘" + select.val() + "‘]");
            if (matchItem.length > 0) {
                matchItem.addClass("div-select-selected");
                updateText(matchItem);
            }
        }
        initSelect();
        select.change(function () {
            initSelect();
        });
    }); // $(".div-select").each
}); // end $.ready

如何使用：

第1步、引用CSS和JS：

<link type="text/css" href="~/Scripts/DivSelect/divSelect.css" rel="stylesheet" />
<script type="text/javascript" src="~/Scripts/jquery-1.7.1.min.js"></script>
<script type="text/javascript" src="~/Scripts/DivSelect/divSelect.js"></script>

第2步、给select控件加上class="div-select" width="200"，其中class="div-select"是必须的，width="200"是可选的。完整HTML代码如下：

<link type="text/css" href="~/Scripts/DivSelect/divSelect.css" rel="stylesheet" />
<script type="text/javascript" src="~/Scripts/jquery-1.7.1.min.js"></script>
<script type="text/javascript" src="~/Scripts/DivSelect/divSelect.js"></script>

<div style="border: solid 1px #f99; margin: 50px; padding: 50px;">
    <select name="sel" class="div-select" width="200" style="display: none;">
        <option value="1">中国</option>
        <option value="2">美国</option>
        <option value="3">法国</option>
        <option value="4">英国</option>
        <option value="5">俄罗斯</option>
        <option value="6">德国</option>
        <option value="7">韩国</option>
        <option value="8">日本</option>
        <option value="9">印度</option>
        <option value="10">巴西</option>
        <option value="11">意大利</option>
        <option value="12">这个国家的名称很长很长很长很长很长很长很长很长</option>
        <option value="13">瑞士</option>
        <option value="14">越南</option>
        <option value="15">缅甸</option>
        <option value="16">泰国</option>
        <option value="17">加拿大</option>
        <option value="18" selected="selected">南非</option>
        <option value="19">澳大利亚</option>
        <option value="20">新西兰</option>
        <option value="21">挪威</option>
        <option value="22">巴勒斯坦</option>
        <option value="23">以色列</option>
        <option value="24">新加坡</option>
        <option value="25">马来西亚</option>
        <option value="26">波兰</option>
        <option value="27">国家27</option>
        <option value="28">国家28</option>
        <option value="29">国家29</option>
        <option value="30">国家30</option>
        <option value="31">国家31</option>
        <option value="32">国家32</option>
        <option value="33">国家33</option>
        <option value="34">国家34</option>
        <option value="35">国家35</option>
        <option value="36">国家36</option>
        <option value="37">国家37</option>
        <option value="38">国家38</option>
    </select>
</div>
<div style="border: solid 1px #f99; margin: 50px; padding: 50px; margin-top: 700px; margin-bottom: 700px;">
    <select name="sel" class="div-select" width="200" style="display: none;">
        <option value="1">中国</option>
        <option value="2">美国</option>
        <option value="3">法国</option>
        <option value="4">英国</option>
        <option value="5">俄罗斯</option>
        <option value="6" selected="selected">德国</option>
        <option value="7">韩国</option>
        <option value="8">日本</option>
    </select>
</div>

效果图：