function bar(url)
{
  wasOpen  = false;
  win = window.open(url);    
  return (typeof(win)=='object')?true:false;
}

function barSized(url, width, height) 
{
  wasOpen  = false;
  windowTest = window.open( url, "windowTest", "status = 1, height = "+height+", width = "+width+", resizable = 1, scrollbars = 1" );   
  return (typeof(windowTest)=='object')?true:false;
}

function hideElement(id)
{
  document.getElementById(id).style.display="none";
}

function showElement(id)
{
  document.getElementById(id).style.display="block";
}