function submit_url() {
					var url = window.location.href;
					var url_naar = "http://www.tornadoconcerts.com/send-friend/?link=" + url;
					//alert(url);
					//alert(url_naar);
					window.open(url_naar,null, 'height=320,width=514,status=yes,toolbar=no,menubar=no,location=no');
					//alert(url_naar);
				}
function menuOpen(a) {
obj = document.getElementById(a); 
if(obj){
obj.style.visibility="visible";
}
}

function menuClose(a) {
obj = document.getElementById(a); 
if(obj){
obj.style.visibility="hidden";
}
}


function checkform_nieuwsbrief(f)
  {
  if (document.getElementById('nieuwsbrief_form').elements['contactpersoon'].value == "")
    {
    alert("Fill your name.");
    window.setTimeout("window.document.nieuwsbrief_form.elements['contactpersoon'].focus()",500);
    return (false);
    }
   if (document.getElementById('nieuwsbrief_form').elements['email_adres'].value == "")
    {
    alert("Fill your e-mail.");
    window.setTimeout("window.document.nieuwsbrief_form.elements['email_adres'].focus()",500);
    return (false);
    }
  else document.getElementById('contactform').submit();		
  }