public static function validHostURL($targetUrl) 
	{
		$req = Yii::app()->request;
		$url = ($req->port == 80? 'http://': 'https://') . $req->serverName;
		
		if(substr($targetUrl, 0, 1) != '/')
			$targetUrl = '/'.$targetUrl;
				
		return $url = $url.$targetUrl;
	}