foreach ($lines as $line) {
			$line = trim($line);
			
			if (substr($line,0,19) == '<!-- START BLOCK : ')
			{
				$line = substr($line,19);
				
				//blockname
				$blockname = substr($line,0,strpos($line,' '));
				
				//block inladen tot endblock
				$this->blocks[$blockname] = '';
				while ($line = trim(next($lines)) && $line != '<!-- END BLOCK : '.$blockname.' -->') {
					$this->blocks[$blockname] .= $line;
				}				
			}
			else 
			{
				$tpl .= $line."\n";
			}
		}