常用Js笔记，以后可能用得上

  <div class="order_head">
                <table>
                    <thead>
                        <tr>
                            <th class="talb1">
                                商品
                                <label><input type="checkbox" class="tgbox3">全选</label>
                            </th>
                            <th>价格</th>
                            <th>数量</th>
                            <th>总额</th>
                            <th>状态</th>
                            <th>操作</th>
                        </tr>
                    </thead>
                </table>
            </div>
                    <table class="order_body">
                        <thead>
                            <tr>
                                <th colspan="6">
                                    <div class="mergeckb">
                                        <input value="255" type="checkbox" class="tgbox" name="mk" />
                                    </div>
                                    <p>订单号：<i>DS180404111619136495</i></p>
                                    <p>下单时间：<i>2018/4/4 11:16:19</i></p>
                                </th>
                            </tr>
                        </thead>
                        <tbody>
                        </tbody>
                    </table>

//关键字搜索
$("#kwdKeyInput").focus(function () {
        document.onkeydown = function (evt) {
            var Withevt = (evt) ? evt : ((window.event) ? window.event : "");
            var keyCode = Withevt.keyCode || Withevt.which || Withevt.charCode;
            if (keyCode == 13) {
                $(‘.or-search ul li button‘).trigger("click");
            }
        }
    }) 

　　//全选
    $(".tgbox3").click(function () {
        //取消全选
        if (!this.checked) {
            $(‘input[class="tgbox"]:checkbox:checked‘);
            var cboxs = $(‘input[class="tgbox"]:checkbox:checked‘);
            $.each(cboxs, function (index, e) {
                removeToCookie($(e).val())
            });
        }

        $(‘.tgbox‘).prop("checked", this.checked);
        $(".many").text($("thead input[name=‘mk‘]:checked").length);

        var cboxs = $(‘input[class="tgbox"]:checkbox:checked‘);
        var cids = [];
        $.each(cboxs, function (index, e) {
            cids.push($(e).val());
        });
        addIdToCookie("," + cids);
    });

//选框选中事件
$(‘input[class="tgbox"]‘).click(function () {
        $(".tgbox3").prop("checked", $(‘input[name="mk"]‘).length == $(‘input[name="mk"]:checked‘).length);

        if (this.checked) {
            addIdToCookie("," + $(this).val());
        } else {
            removeToCookie($(this).val());
        }
    });

//数组去重 
function distinct(arr) {
        var len = arr.length;
        arr.sort();
        for (var i = len - 1; i > 0; i--) {
            if (arr[i] == "") { arr.splice(i, 1); }
            if (arr[i] == arr[i - 1]) {
                arr.splice(i, 1);
            }
        }
        return arr;
    }

 //移除数组
    function removeToCookie(id) {
        var cookie = getCookie("orderIds") || "";
        var cookieArray = cookie.split(",");
        var idArray = id.split(",");
        if (cookie.indexOf(id) >= 0) {
            $.each(cookieArray, function (index, item) {
                $.each(idArray, function (index2, iditem) {
                    if (iditem == item) {
                        cookieArray.splice(index, 1);
                    }
                });
            });

            delCookie("orderIds");
            setCookie("orderIds", cookieArray.join(","), 10);
        }

$(function () {
        //加载时选中之前选中项
        $(‘.tgbox‘).each(function () {
            var allCookie = getCookie("orderIds") || "";
            if (allCookie.indexOf($(this).val()) >= 0) {
                $(this).prop(‘checked‘, true);
            }
        });
        //如果选中项等于当前表单所有项， 则说明是全选。
        $(".tgbox3").prop("checked", $(‘input[name="mk"]‘).length == $(‘input[name="mk"]:checked‘).length);
    })