function print_obj(obj, f_str)
{
    var str = '';
    var j = 0;
    for (var i in obj)
    {
        str += i + ' => ';
        eval ('str += obj.' + i);
        str += "\n";
        if (j++ > 30)
        {
            alert(str);
            j = 0;
            str = '';
        }
    }
    if (f_str)
        return str;
    if (str.length)
        alert(str);
}

function print_arr(arr)
{
    var str = '';
    for (var i in arr)
       str += i + '=>' + arr[i] + "\n";
    alert(str);
}

function getEl(id)
{
    return document.getElementById(id);
}