//metoda pro cteni parametru z url
function getUrlVars(URL) {
    var vars = [], hash;
    var hashes = URL.slice(URL.indexOf('?') + 1).split('&');
    for (var i = 0; i < hashes.length; i++) {
        hash = hashes[i].split('=');
        vars.push(hash[0]);
        vars[hash[0]] = hash[1];
    }
    return vars;
}