function sure()
{
    return confirm('Вы уверены ?');
}


function openWin(url, name, width, height)
{
  if (! width) {
           width = screen.width*0.9;
  }
  if (! height) {
           height = screen.height*0.75;
  }
  var newWindow = window.open(url, name, 'left=' + Math.ceil((screen.width - width)/2) + ',top=' + Math.ceil((0+screen.height - height)/2) + ',width=' + width + ',height=' + height + ',location=0,toolbar=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,channelmode=0,fullscreen=0');
  newWindow.focus();
  return false;
}

function selectAll(sName, bValue)
{
    var oObj = document.getElementsByName(sName);
    for(var i=0; i < oObj.length; ++i) oObj[i].checked = bValue;
}

function checkSel(sName)
{
    var oObj = document.getElementsByName(sName);
    for(var i=0; i < oObj.length; ++i)
    {
        if (oObj[i].checked) return true;
    }
    alert('Выберите хотя бы один элемент');
    return false;
}

function openImage(url, width, height) {
	openWin(url, 'im', width + 10, height + 10);
}