这是我在YII中显示图像的代码

$this->widget('zii.widgets.jui.CJuiDatePicker',array(
'name' => 'sso_register[dob]',//'model' => $model,'attribute' => 'dob','value' => $dbText,'options' => array(
'changeMonth' => true,'changeYear' => true,'dateFormat' => 'dd/mm/yy','yearRange' => "-100:+0",'maxDate' => '31/12/2007',//day can choose >= tomorrow
'buttonImage' => Yii::app()->baseUrl . '/images/date_picker.png','buttonImageOnly' => true,'showButtonPanel' => false,'showOn' => 'button','altField' => '',),'htmlOptions' => array(
'class' => 'inputfield-middleside-date','readonly' => 'true','style' => 'position: relative; z-index: 100;','tabindex' => '7','alt'=>'','title'=>'',)
));

在所有浏览器中删除图像alt属性中的这3个点的任何方法？
谢谢