reloading trello if connection is lost

gistfile1.js

// ==UserScript==
// @name       Trello reload
// @namespace  http://use.homepage/
// @version    0.1
// @description  Script will check if trello lost an internet connection and will reload it if connection exists
// @match      https://trello.com/*
// @copyright  2015+, You
// ==/UserScript==

function check_for_lost_connection() {
	return setInterval(function(){
		console.log('check');
 
		// #notification_connection:visible  notification_AjaxQueueRetry
		if (0 != $('#notification_connection:visible').length && 0 == $('textarea.list-card-composer-textarea:visible').length) {
			//check_connection();
			if (doesConnectionExist()) {
				reaload_trello();
			} else {
				console.log('no connection');
			}
		} else {
 
		}
	}, 1000);
}
 
 
 


function doesConnectionExist() {
    var xhr = new XMLHttpRequest();
    var file = "https://trello.com/images/apple-touch-icon-precomposed.png";
    var randomNum = Math.round(Math.random() * 10000);
     
    xhr.open('HEAD', file + "?rand=" + randomNum, false);
     
    try {
        xhr.send();
         
        if (xhr.status >= 200 && xhr.status < 304) {
            return true;
        } else {
            return false;
        }
    } catch (e) {
        return false;
    }
}
 
function reaload_trello() {
	location.reload();
	clearInterval(check_for_disconnect);
}

if ('undefined' != typeof($)) {
    var check_for_disconnect = check_for_lost_connection();
}