function submit_url() {
					var url = window.location.href;
					var url_naar = "http://www.vhse.nl/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();		
  }

function checkform_howtobuy(f)
  {
  if (f.elements['bedrijfsnaam'].value == "")
    {
    alert("Vul uw bedrijfsnaam in.");
    window.setTimeout("document.forms['howtobuyform'].elements['bedrijfsnaam'].focus()",500);
    return (false);
    }
  if (f.elements['contactpersoon'].value == "")
    {
    alert("Vul de naam van uw contactpersoon in.");
    window.setTimeout("document.forms['howtobuyform'].elements['contactpersoon'].focus()",500);
    return (false);
    }
  if (f.elements['adres'].value == "")
    {
    alert("Vul uw adres in.");
    window.setTimeout("document.forms['howtobuyform'].elements['adres'].focus()",500);
    return (false);
    } 
  if (f.elements['postcode'].value == "")
    {
    alert("Vul uw postcode in.");
    window.setTimeout("document.forms['howtobuyform'].elements['postcode'].focus()",500);
    return (false);
    }  
  if (f.elements['woonplaats'].value == "")
    {
    alert("Vul uw woonplaats in.");
    window.setTimeout("document.forms['howtobuyform'].elements['woonplaats'].focus()",500);
    return (false);
    }   
  if (f.elements['telefoon'].value == "")
    {
    alert("Vul uw telefoonnummer in.");
    window.setTimeout("document.forms['howtobuyform'].elements['telefoon'].focus()",500);
    return (false);
    }    
 if (f.elements['email_adres'].value == "")
    {
    alert("Geen e-mail ingevoerd.");
    window.setTimeout("document.forms['howtobuyform'].elements['email_adres'].focus()",500);
    return (false);
    }
   else f.submit();		
  }