CJuiButton

public function init()
{
    parent::init();

    if($this->buttonType=='buttonset')
    {
        if(!isset($this->htmlOptions['id']))
            $this->htmlOptions['id']=$this->getId();

        echo CHtml::openTag($this->htmlTag,$this->htmlOptions);
    }
}

public function run()
{
    $cs=Yii::app()->getClientScript();
    list($name,$id)=$this->resolveNameID();

    if(isset($this->htmlOptions['id']))
        $id=$this->htmlOptions['id'];
    else
        $this->htmlOptions['id']=$id;
    if(isset($this->htmlOptions['name']))
        $name=$this->htmlOptions['name'];
    else
        $this->htmlOptions['name']=$name;

    if($this->buttonType=='buttonset')
    {
        echo CHtml::closeTag($this->htmlTag);
        $cs->registerScript(__CLASS__.'#'.$id,"jQuery('#{$id}').buttonset();");
    }
    else
    {
        switch($this->buttonType)
        {
            case 'submit':
                echo CHtml::submitButton($this->caption,$this->htmlOptions)."\n";
                break;
            case 'button':
                echo CHtml::htmlButton($this->caption,$this->htmlOptions)."\n";
                break;
            case 'link':
                echo CHtml::link($this->caption,$this->url,$this->htmlOptions)."\n";
                break;
            case 'radio':
                if($this->hasModel())
                {
                    echo CHtml::activeRadioButton($this->model,$this->attribute,$this->htmlOptions);
                    echo CHtml::label($this->caption,CHtml::activeId($this->model,$this->attribute))."\n";
                }
                else
                {
                    echo CHtml::radioButton($name,$this->value,$this->htmlOptions);
                    echo CHtml::label($this->caption,$id)."\n";
                }
                break;
            case 'checkbox':
                if($this->hasModel())
                {
                    echo CHtml::activeCheckbox($this->model,$this->attribute,$this->htmlOptions);
                    echo CHtml::label($this->caption,CHtml::activeId($this->model,$this->attribute))."\n";
                }
                else
                {
                    echo CHtml::checkbox($name,$this->value,$this->htmlOptions);
                    echo CHtml::label($this->caption,$id)."\n";
                }
                break;
            default:
                throw new CException(Yii::t('zii','The button type "{type}" is not supported.',array('{type}'=>$this->buttonType)));
        }

        $options=CJavaScript::encode($this->options);
        if($this->onclick!==null)
        {
            if(!($this->onclick instanceof CJavaScriptExpression))
                $this->onclick=new CJavaScriptExpression($this->onclick);
            $click=CJavaScript::encode($this->onclick);
            $cs->registerScript(__CLASS__.'#'.$id,"jQuery('#{$id}').button($options).click($click);");
        }
        else
            $cs->registerScript(__CLASS__.'#'.$id,"jQuery('#{$id}').button($options);");
    }
}