public function addStylesheet ($src, $prepend = false)
		{
			if ($prepend) {
				array_unshift($this->stylesheetUrls, $src);
			} else {
				$this->stylesheetUrls[] = $src;
			}

			$html = '<link rel="stylesheet" type="text/css" href="' . $this->sanitize($src) . '" />';

			$this->addHeader($html, $prepend);
		}