pedantically similar typical (bad) ajax worker

script.js

function paralellAjax(url,callback){
    var quickAjax = function(url,cb){
        var ajax = new XMLHttpRequest();
        ajax.onreadystatechange = function(resp){
            if(ajax.readyState === 4 && ajax.status === 200) {
			    cb(JSON.stringify(ajax.response));
		    }
	    }
	    ajax.open('GET',url,true);
	    ajax.send();
    }
    var ajaxWorker = cw(quickAjax)
    ajaxWorker.data(url).then(function(data){
        callback(null,data);
        ajaxWorker.close();
    },function(data){
        callback(data);
        ajaxWorker.close();
    });
}