public function addCss($css = array())
	{
		foreach ($css as $file => $options)
		{
			$this->stylesheets = array_add($this->stylesheets, $file, $options);
		}
	}
public function addCss($css = array())
	{
		foreach ($css as $file => $options)
		{
			$this->stylesheets = array_add($this->stylesheets, $file, $options);
		}
	}
public function addCss ( $ css = array ( ) ) { foreach ( $ css as $ file => $ options ) { $ this -> stylesheets = array_add ( $ this -> stylesheets , $ file , $ options ) ; } }
Register several stylesheets.

@return void
Register several stylesheets .