boostrap模态框中使用webuploader文件上传按钮失效 怎么解决

```
上传文件的代码
//背景图编辑
function clickEdictBg(ele) {
    $("#ModalImg").prop("src", $(ele).attr("src"));
    UpImg(ele);
}function clickEdict(ele) {
    $(ele).siblings('div').removeClass('clickEdict-border').find('.clickEdict').css('display', 'none');
    $(ele).toggleClass('clickEdict-border').find('.clickEdict').toggle();
    if ($(ele).hasClass('clickEdict-border')) {
        $(ele).attr('title', '再次点击可取消编辑');
    }
    else {
        $(ele).attr('title', '点击可编辑');
    }
}
function changeIMG(ele) {
    $("#ModalImg").prop("src", $(ele).next().attr("src"));
    UpImg($(ele).next());
}
function changeIMG_2(ele) {
    $("#ModalImg").prop("src", $(ele).next().children().attr("src"));
    UpImg($(ele).next().children());
}
function changeEggsIMG(ele) {
    $("#ModalImg").prop("src", $(ele).next().find("img").attr("src"));
    UpImg($(ele).next().find("img"));
}
//界面上传图片
var uploader110;
function UpImg(el) {
    if (!uploader110) {
        uploader110 = WebUploader.create({
            // swf文件路径
            swf: '~/Scripts/WebUploader/Uploader.swf',
            // 文件接收服务端。
            server: '/DBH/UploadImgToOSS_DataName',
            // 选择文件的按钮。可选。
            // 内部根据当前运行是创建，可能是input元素，也可能是flash.
            pick: {
                id: '#lak',
                //id: selector,
                multiple: false
            },
            accept: {
                title: '图片',
                extensions: 'gif,jpg,jpeg,bmp,png',
                mimeTypes: 'image/gif,image/jpg,image/jpeg,image/bmp,image/png'
            },
            threads: 1, //上传并发数
            disableGlobalDnd: true,
        });
        uploader110.on('uploadError', function (file, r) {
            $.L.msgWarning("上传出错！");
        });
        uploader110.on('error', function (r) {
            $.L.msgError("格式有误,请上传图片文件！");
        })
        uploader110.on('uploadComplete', function (file) {
            $('#' + file.id).remove();
        });
    }
    for (var i = 0; i < uploader110._events.length; i++) {
        var _event_temp = uploader110._events[i];
        if (_event_temp) {
            if (_event_temp.e == "fileQueued" ||
                _event_temp.e == "uploadProgress" ||
                _event_temp.e == "uploadSuccess") {
                uploader110._events.splice(i, 1);
                i--;
            }
        }
    }
    // 当有文件被添加进队列的时候
    uploader110.on('fileQueued', function (file) {
        $('#showImg').append('<div id="' + file.id + '" >' +
            '<p class="state">等待上传...</p>' +
            '</div>');
        uploader110.upload();
    });    // 文件上传过程中创建进度条实时显示。
    uploader110.on('uploadProgress', function (file, percentage) {
        var $li = $('#' + file.id),
            $percent = $li.find('.progress .progress-bar');
        // 避免重复创建
        if (!$percent.length) {
            $percent = $('<div class="progress progress-striped active">' +
                '<div class="progress-bar" role="progressbar" style="width: 0%">' +
                '</div>' +
                '</div>').appendTo($li).find('.progress-bar');
        }
        $li.find('p.state').text('上传中');
        $percent.css('width', percentage * 100 + '%');
    });    uploader110.on('uploadSuccess', function (file, response) {
        $('#ModalImg').attr('src', response._raw);
        $('.clickEdict-border').removeClass('clickEdict-border').find('.clickEdict').css('display', 'none');
        $(el).attr("src", response._raw);
        if ($(el).attr('id') == 'companyLogo') {
            $('#LogoImgUrl').attr("src", response._raw);
        }
        if ($(el).attr('id') == 'PublicCode') {
            $('#Upload_WXCodeImgUrl').attr("src", response._raw);
        }
        $.L.msgSuccess('上传成功！');
    });
}
```