/**
 * @brief Vrací parametr GET požadavku stránky
 */
urlParam = function(name) {
    var results = new RegExp('[\?&]' + name + '=([^&#]*)').exec(window.location.href);
    if (results==null) {
        return null;
      } else {
        return results[1] || 0;
        }
};


redirectTo = function(url) {
    window.location.replace(url);
};


sendDelete = function(url, redirect) {
    var rq = new XMLHttpRequest();
    rq.open("DELETE", url, true);
    rq.setRequestHeader("Content-Type", "application/json");
    rq.onloadend = function() {
        redirectTo(redirect);
        }
    rq.onerror = function(e) {
        console.log("sendDelete: request failed");
        }
    rq.send("{}");
};


sendGet = function(url, redirect) {
    var rq = new XMLHttpRequest();
    rq.open("GET", url, true);
    rq.setRequestHeader("Content-Type", "application/json");
    rq.onloadend = function() {
        redirectTo(redirect);
        }
    rq.onerror = function(e) {
        console.log("sendDelete: request failed");
        }
    rq.send("{}");
};