I have some buttons in the TbGridView and I want to open the link in a new window (Target = _blank. How would I do this with the TbButtonColumn. My code is
 $this->widget('bootstrap.widgets.TbGridView', array(
    'type' => 'striped bordered condensed',
    'dataProvider' => $dataProviderPI, 
    'enablePagination'=>true,
    'summaryText'=>'Displaying Insurance Documents {start}-{end} of {count} results.',
    'template' => "{summary}{items}{pager}",
    'htmlOptions'=>array('style' => 'width:500px;margin-left: 130px;',),
    'columns' => array(
        array('name' => 'insurer', 'header' => 'Insurance Company'),
        array('name' => 'policy_no', 'header'=> 'Policy Number'),
        array('name' => 'cover_amount', 'header'=> 'Cover Amount'),
        array('name' => 'finish_date', 'header'=> 'Expiry Date'),
        array('name' => 'scanned_doc', 'header' => 'Document'),       
        array(
            'class'=>'bootstrap.widgets.TbButtonColumn',
            'header'=>'View',
            'template'=>'{view}',
            'viewButtonUrl'=>'"$data->scanned_doc"',
            'htmlOptions'=>array('style'=>'width:20px;text-align:center;'),
        ),
        ),
)); ?>
I am unsure how the following in a new window
'viewButtonUrl'=>'"$data->scanned_doc"',
Any help appreciated