// enqueue google web font; e.g. get_webfont('Open Sans', 'normal');
	function get_webfont($name, $weight='normal') {
		static $nums = array(
			'thin' => 100,
			'extra-light' => 200,
			'light' => 300,
			'normal' => 400,
			'regular' => 400,
			'medium' => 500,
			'semi-bold' => 600,
			'bold' => 700,
			'extra-bold' => 800,
			'ultra-bold' => 900
		);

		// abort if invalid name
		$name = trim($name);
		if(empty($name)) { return; }

		// convert comma-separated into array
		if(!is_array($weight)) {
			$weights = explode(',', $weight);

		// pass in weight array
		} else {
			$weights = $weight;
		}

		// abort if no weights
		if(empty($weights)) { return; }

		// convert name to url-encoded and slug forms
		$url = urlencode($name);
		$slug = 'font-'.str_replace(' ', '-', strtolower(trim($name)));

		// enqueue weights (each on a separate line to appease Internet Explorer)
		$ie = detect_ie();
		if(!empty($ie) && ($ie <= 8)) {
			foreach($weights as $weight) {

				// convert weight to lowercase string
				$weight = strtolower(trim($weight));

				// split weight name from extra info
				list($weight, $extra) = preg_split('/\s+/', $weight, 2);

				// lookup weight name
				if(!is_numeric($weight)) {
					$weight = (isset($nums[$weight]) ? $nums[$weight] : 0);
				}

				// skip if invalid weight
				if(!is_numeric($weight) || ($weight < 100)) {
					continue;
				}

				// register & enqueue font style
				wp_register_style($slug.'-'.$weight.$extra, '//fonts.googleapis.com/css?family='.$url.':'.$weight.$extra);
				wp_enqueue_style($slug.'-'.$weight.$extra);
			}

		// enqueue fonts
		} else {

			// numbers list
			$list = array();

			// convert weights to numbers
			foreach($weights as $weight) {

				// convert weight to lowercase string
				$weight = strtolower(trim($weight));

				// split weight name from extra info
				list($weight, $extra) = preg_split('/\s+/', $weight, 2);

				// lookup weight name
				if(!is_numeric($weight)) {
					$weight = (isset($nums[$weight]) ? $nums[$weight] : 0);
				}

				// skip if invalid weight
				if(!is_numeric($weight) || ($weight < 100)) {
					continue;
				}

				$list[] = $weight.$extra;
			}

			// register & enqueue font style
			if(count($list) > 0) {
				$weights = implode(',', $list);
				wp_register_style($slug, '//fonts.googleapis.com/css?family='.$url.':'.$weights);
				wp_enqueue_style($slug);
			}
		}
	}