$this->widget('zii.widgets.jui.CJuiButton', array(
    'buttonType'=>'submit',
    'name'=>'btnSubmit',
    'value'=>'1',
    'caption'=>'Submit',
    'htmlOptions'=>array('class'=>'ui-button-primary')
));

$this->widget('zii.widgets.jui.CJuiButton', array(
    'buttonType'=>'button',
    'name'=>'btnClick',
    'caption'=>'Click',
    'onclick'=>'js:function(){alert("clicked"); this.blur(); return false;}',
));

$this->widget('zii.widgets.jui.CJuiButton', array(
    'buttonType'=>'link',
    'name'=>'btnGo',
    'caption'=>'Go',
    'url'=>array('site/index'),
));