Page refreshing userscript for Greasemonkey

userscript_reloader.js

// ==UserScript==
// @name        Reload on error message
// @namespace   http://userscripts.org/users/23652
// @description Reload the page on an error message you set yourself
// @version     0.5
// @author      JoeSimmons, Nickel
// @grant       none
// @include     *
// ==/UserScript==

// Add your errors here to the pattern ///////////////
var errors = [];
errors[0] = /Too many connections. Please try again later./i;
errors[1] = /Mysql error, could not connect Too many connections/i;
errors[2] = /max_user_connections/i;
errors[3] = /502 Bad Gateway/i;
errors[4] = /504 Gateway Time-out/i;
errors[5] = /Something broke/i;
errors[6] = /Imgur is over capacity!/i;
errors[7] = /The database timed out running your query./i;
errors[8] = /we took too long to make this page for you/i;
//////////////////////////////////////////////////////

if ((typeof(sessionStorage.getItem('timer')) !== 'undefined' ) && (typeof(sessionStorage.getItem('timer')) !== null )) {
    // the timer is defined
  	console.log('the timer is defined', sessionStorage.getItem('timer'));
  	var cooldown = parseInt(sessionStorage.getItem('timer'));
  	cooldown += 100;
} else if (sessionStorage.getItem('timer') == 'null') {
		
}
else {
  	var cooldown = 1000;
  	sessionStorage.setItem('timer', cooldown); // saving timer status in sessionStorage
  	console.log('define new timer');
}

cooldown = parseInt(sessionStorage.getItem('timer')); // getting timer status from sessionStorage
console.log('cooldown is: ', parseInt(cooldown));

//typeof()

function check() {
	for(var i=0; i<errors.length; i++) {
		if(errors[i].test(document.body.textContent)){
			
      console.log(cooldown);
      //window.location.reload();
		}
	}
}

if (cooldown < 1000) {
	cooldown = 1000;
  console.log('cooldown is too short. Resetting to default');
}

setTimeout(check, cooldown);