function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function MM_jumpMenu(targ,selObj,restore){ //v3.0
  eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
  if (restore) selObj.selectedIndex=0;
}

function checkAanmelding(formulier)
{
   // return 1; // FOR TESTING...
	if (formulier.bg_user_name.value=="")
   {
      alert("Vul bedrijfsnaam in.");
      return false;
   }
   else if (formulier.bg_user_contact.value=="")
   {
      alert("Vul contactpersoon in.");
      return false;
   }
   else if (formulier.bg_user_chamber_of_commerce.value=="")
   {
      alert("Vul KvK-nummer in.");
      return false;
   }
   else if (formulier.bg_user_vat_code.value=="")
   {
      alert("Vul BTW-nummer in.");
      return false;
   }
   else if (formulier.bg_user_bank_account.value=="")
   {
      alert("Vul bankrekening in.");
      return false;
   }
   else if (formulier.bg_user_address.value=="")
   {
      alert("Vul bezoekadres in.");
      return false;
   }
   else if (formulier.bg_user_pobox.value=="")
   {
      alert("Vul postcode in.");
      return false;
   }
   else if (formulier.bg_user_place.value=="")
   {
      alert("Vul woonplaats in.");
      return false;
   }
   else if (formulier.bg_user_address_invoice.value=="")
   {
      alert("Vul factuuradres in.");
      return false;
   }
   else if (formulier.bg_user_pobox_invoice.value=="")
   {
      alert("Vul postcode in.");
      return false;
   }
   else if (formulier.bg_user_place_invoice.value=="")
   {
      alert("Vul plaats in.");
      return false;
   }
   else if (formulier.bg_user_email.value=="")
   {
      alert("Vul emailadres in.");
      return false;
   }
	else return 1;
}

function submitAanmelding(formulier)
{
	if (checkAanmelding(formulier)) formulier.submit();
}