public static function print_html(){
		echo('<div class="debuginfo">');
		echo('<p><b>Debug information:</b></p>');
		foreach(self::$strings as $msg){
			$style='';
			switch($msg->level){
				case LL_GENERAL:
				case LL_DEBUG:
				case LL_INFO:
					$style='';
					break;
				case LL_WARNING:
				case LL_ERROR:
					$style='color: red;';
					break;
				}
			echo('<p style="'.$style.'">');
			if(self::$memprof){
				echo('(<span class="time">'.sprintf('%.7f',$msg->time).'</span> : ');
				echo('<span class="mem" title="'.$msg->mem.' bytes">'.sprintf('%.2f Mb',($msg->mem / 1048576)).')</span> - ');
				}
			else{
				echo('<span class="time">('.sprintf('%.7f',$msg->time).')</span> - ');
				}
			echo(htmlspecialchars($msg->text));
			echo('</p>');
			}
		echo('</div>');
		}