function GetCookie(name) {
    var arg = name + "=";
    var alen = arg.length;
    var clen = document.cookie.length;
    var i = 0;
    while (i < clen) {
        var j = i + alen;
        if (document.cookie.substring(i, j) == arg) {
            var endstr = document.cookie.indexOf(";", j);
            if (endstr == -1) endstr = clen;
            return unescape(document.cookie.substring(j, endstr));
        }
        i = document.cookie.indexOf(" ", i) + 1;
        if (i == 0) break;
    }
    return null;
}


function show_msg(parent, msg)
{
    var el = parent.insertFirst({html:msg, cls:'msg'})
    el.fadeOut.defer(1000, el, [{duration:0.6, remove:true}]);
}

function vote(a, url)
{
    var parent = Ext.fly(a).parent(), votes = parent.select('div');
    Ext.Ajax.request({
        url: '/vote/' + url + '/?h=' + GetCookie('csrftoken'),
        method: 'get',
        success: function(response, opts) {
            result = Ext.decode(response.responseText);
            votes.update(result.votes);
            show_msg(parent, result.message)
        },
        failure: function(response, opts) {
            show_msg(parent, "Wystąpił błąd serwera (" + response.status + ")")
        }
    });
    return false;
}