jQuery+css模拟下拉框模糊搜索的实现

html:

@*输入框*@
<div>
    <input type="text" style=" 85%; height: 34px;" onkeyup="InputChange(this)" id="txtInput">
</div>
@*模拟下拉框*@
<div class="divselect" id="dpSelect">

</div>

css:

/*选择框效果*/
.divselect {
    float: left;
    position: relative;
    z-index: 3003;
    background: #fff;
    display: none;
    width: 85%;
}
.divselect ul {
    padding: 0;
    margin: 0;
    border: 1px solid #E4E4E4;
    background-color: #ffffff;
    position: absolute;
    z-index: 30000;
    margin-top: -1px;
    width: 100%;
    overflow: auto;
    max-height: 200px;
}
.divselect ul li {
    list-style-type: none;
    cursor: pointer;
    height: 24px;
    line-height: 24px;
}
.divselect ul li:hover {
    background: #ccc;
}

js:

<script type="text/javascript">
    //点击模拟下拉框以外的地方 下拉框消失
    $(document).bind('click', function (e) {
        var e = e || window.event; //浏览器兼容性
        var elem = e.target || e.srcElement;
        while (elem) { //循环判断至跟节点，防止点击的是div子元素
            if (elem.id && elem.id == 'dpSelect') {
                return;
            }
            elem = elem.parentNode;
        }
        $('#dpSelect').css('display', 'none'); //点击的不是div或其子元素
    });

    //用文本框onkeyup事件触发InputChange方法 InputChange方法判断文本框文字是否改变 文字改变则触发SearchName方法
    var sOldValue;
    sOldValue = "";
    function InputChange(arg) {
        var vNewValue = $(arg).val();
        if (sOldValue != vNewValue) {
            //根据条件查询结果并给下拉框动态赋值
            SearchName(arg);
            sOldValue = vNewValue;
        }
    }
    function SearchName(arg) {
        var name = $(arg).val();
        //如果搜索框为空 则返回false
        if (name == "") {
            $("#dpSelect").attr("style", "display:none");
            return false;
        }
        else {
            $("#dpSelect").attr("style", "display:block");
        }
        //获取数据 并给下拉框动态赋html
        $.ajax({
            type: "post",
            url: "......",
            data: { name: name },
            dataType: "",
            async: false,
            success: function (data) {
                var strs = "";
                strs += "<ul>";
                for (var i = 0; i < data.length; i++) {
                    strs += '<li onclick="SetValue(this)">' + data[i] + '</li>';
                }
                strs += "</ul>";
                $("#dpSelect").html(strs);
            },
            error: function () {
                alert("查询出错");
            }
        });

    }
    //点击模拟下拉框内选项后 给文本框赋值 关闭下拉框
    function SetValue(arg) {
        var value = $(arg).text();
        $("#txtInput").val(value);
        $("#dpSelect").attr("style", "display:none");
    }
</script>