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

  if (document.getElementById('nieuwsbrief_form').elements['postcode'].value == "")
      {
      alert("Vul uw postcode in.");
      window.setTimeout("window.document.contactform.elements['postcode'].focus()",500);
      return (false);
    }

  if (document.getElementById('nieuwsbrief_form').elements['plaats'].value == "")
      {
      alert("Vul de naam van uw woonplaats in.");
      window.setTimeout("window.document.contactform.elements['plaats'].focus()",500);
      return (false);
    }

  if (document.getElementById('nieuwsbrief_form').elements['email_adres'].value == "")
      {
      alert("Vul uw email_adres in.");
      window.setTimeout("window.document.contactform.elements['email_adres'].focus()",500);
      return (false);
    }  
  else 
     document.getElementById('nieuwsbrief_form').submit();		

 }

function checkform_vacature(f)                             
{
  if (document.getElementById('vacatureform').elements['voorletters'].value == "")
        {
        alert("Vul de voorletters in.");
        window.setTimeout("window.document.contactform.elements['voorletters'].focus()",500);
        return (false);
    }
  if (document.getElementById('vacatureform').elements['naam'].value == "")
        {
        alert("Vul de naam in.");
        window.setTimeout("window.document.contactform.elements['naam'].focus()",500);
        return (false);
    }  
  if (document.getElementById('vacatureform').elements['adres'].value == "")
        {
        alert("Vul adres in.");
        window.setTimeout("window.document.contactform.elements['adres'].focus()",500);
        return (false);
    }    
  if (document.getElementById('vacatureform').elements['postcode'].value == "")
        {
        alert("Vul postcode in.");
        window.setTimeout("window.document.contactform.elements['postcode'].focus()",500);
        return (false);
    }      
  if (document.getElementById('vacatureform').elements['plaats'].value == "")
          {
          alert("Vul plaats in.");
          window.setTimeout("window.document.contactform.elements['plaats'].focus()",500);
          return (false);
    }      
  if (document.getElementById('vacatureform').elements['telefoon'].value == "")
          {
          alert("Vul telefoon in.");
          window.setTimeout("window.document.contactform.elements['telefoon'].focus()",500);
          return (false);
    }        
  if (document.getElementById('vacatureform').elements['email_adres'].value == "")
          {
          alert("Vul email_adres in.");
          window.setTimeout("window.document.contactform.elements['email_adres'].focus()",500);
          return (false);
    }        
  else 
     document.getElementById('vacatureform').submit();		
}  

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