KindEditor编辑器配合Textarea取值判断非空的解决方法

<div class="form-group">
<label for="txtDescription" class="col-xs-2 col-sm-2 col-md-2 col-lg-2"><span class="red">*</span>详情</label>
<div class="col-xs-10 col-sm-10 col-md-10 col-lg-10">
<asp:TextBox ID="txtDescription" runat="server" TextMode="MultiLine" Rows="20" MaxLength="4000" EnableTheming="True" CssClass="form-control kindeditor"  Text=""></asp:TextBox>
</div>
</div>

//初始化编辑器
    var editor = KindEditor.create('textarea.kindeditor', {
        //width: '100%',
        //height: '350px',
        filterMode: false, //默认不过滤HTML
        resizeType: 1,
        uploadJson: '../../../Tools/Uploader.ashx?action=EditorFile&SubFolder=Notice&IsWater=0',
        fileManagerJson: '../../../Tools/Uploader.ashx?action=ManagerFile&SubFolder=Notice',
        allowFileManager: true,
        bodyClass: 'article-content',
        //经测试，下面这行代码可有可无，不影响获取textarea的值
        //afterCreate: function(){this.sync();}
        //下面这行代码就是关键的所在，当失去焦点时执行 this.sync();
        afterBlur: function(){this.sync();}
    });