fastadmin 弹出窗口如何进行打印

 想点击打印按钮，然后打印内容也中的表格，但是直接用window.print()打印的是整个页面

<table class="pure-table pure-table-bordered">
        <thead>
            <tr>
                <th>#</th>
                <th>Make</th>
                <th>Model</th>
                <th>Year</th>
            </tr>
        </thead>
    
        <tbody>
            <tr>
                <td>1</td>
                <td>Honda</td>
                <td>Accord</td>
                <td>2009</td>
            </tr>
    
            <tr>
                <td>2</td>
                <td>Toyota</td>
                <td>Camry</td>
                <td>2012</td>
            </tr>
    
            <tr>
                <td>3</td>
                <td>Hyundai</td>
                <td>Elantra</td>
                <td>2010</td>
            </tr>
        </tbody>
    </table>
    <div class="form-group layer-footer">
        <label class="control-label col-xs-12 col-sm-2"></label>
        <div class="col-xs-12 col-sm-8">
            <button type="button" class="btn btn-success btn-print"  style="margin-right:120px;">打印</button>
            <button type="button" class="btn btn-primary btn-embossed btn-close" onclick="Layer.closeAll();">{:__('Close')}</button>
        </div>
    </div>

$(document).on("click", ".btn-print", function(){
    window.print();
});