var filter_mail       = /^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i;
  var alert_string      = "All mandatory fields must be field in.";
  var alert_mail        = "Please enter a valid email address.";
  var alert_wrong_pass  = "Passwords do not match. Try again.";
  var alert_little_pass = "The password must be at least 5 characters";
  var confirm_delete    = "Confirm delete?";


  function gotoJ(url)
  {
    window.location.href = url;
    return;
  }

  function justified_blocks_height(block_name,col_count)
  {
    //temp = new Array;
    elem = new Array;
    temp = document.getElementsByTagName('div');
    ct   = 0;
    max_h= 0;
    for (i = 0; i < temp.length; i++)
    {
      if ((temp[i].name == block_name) || (temp[i].id == block_name))
      {
        elem[ct++] = temp[i];
        if (temp[i].clientHeight > max_h)
          max_h = temp[i].clientHeight+1;
      }
    }
    for (k = 0; k<ct; k++)
    {
      elem[k].style.height = max_h+"px";
    }
    return;
  }

  function check_mandatory_fields(sender)
  {
    for (i = 0; i < sender.elements.length; i++)
    {
      if (sender.elements[i].className == "field_zirka")
      {
        if (sender.elements[i].value.length <= 0)
        {
          alert (alert_string);
          sender.elements[i].focus();
          return false;
        }
        if (sender.elements[i].name == "mail")
        {
          if (!filter_mail.test(sender.elements[i].value))
          {
            alert(alert_mail);
            sender.elements[i].focus();
            return false;
          }
        }
        if ((sender.elements[i].type == "password") || (sender.elements[i].type == "new_password"))
        {
          if (sender.elements[i].value.length < 5)
          {
            alert(alert_little_pass);
            sender.elements[i].focus();
            return false;
          }
          if (sender.confirm_password)
          {
            if (sender.confirm_password.value != sender.elements[i].value)
            {
              alert(alert_wrong_pass);
              sender.confirm_password.focus();
              return false;
            }
          }
        }
      }
    }
    return true;
  }