function validateForm(vat)
{

if(""==document.forms.vat.name.value)
{
alert("Please enter your name.");
return false;
}

if(""==document.forms.vat.email_address.value)
{
alert("Please enter your email address.");
return false;
}

if(""==document.forms.vat.telephone_number.value)
{
alert("Please enter your telephone number.");
return false;
}

if(""==document.forms.vat.address.value)
{
alert("Please enter your address.");
return false;
}

if(""==document.forms.vat.description_of_condition.value)
{
alert("Please enter a description of your condition.");
return false;
}

if(""==document.forms.vat.description_of_goods.value)
{
alert("Please enter your a description of your goods.");
return false;
}

if(""==document.forms.vat.declare.value)
{
alert("Please check the checkbox to declare your condition");
return false;
}


}



function cardval(s) {
// remove non-numerics
var v = "0123456789";
var w = "";
for (i=0; i < s.length; i++) {
x = s.charAt(i);
if (v.indexOf(x,0) != -1)
w += x;
}
// validate number
j = w.length / 2;
if (j < 6.5 || j > 8 || j == 7) return false;
k = Math.floor(j);
m = Math.ceil(j) - k;
c = 0;
for (i=0; i<k; i++) {
a = w.charAt(i*2+m) * 2;
c += a > 9 ? Math.floor(a/10 + a%10) : a;
}
for (i=0; i<k+m; i++) c += w.charAt(i*2+1-m) * 1;
return (c%10 == 0);
}




function checkform ( form )
{
  // ** START **
  if (form.first_name.value == "") {
    alert( "Please enter your first name." );
    form.first_name.focus();
    return false ;
  }
  
  if (form.last_name.value == "") {
    alert( "Please enter your last name" );
    form.last_name.focus();
    return false ;
  }


  if (form.house_no.value == "") {
    alert( "Please enter your house number" );
    form.house_no.focus();
    return false ;
  }
  
  if (form.address1.value == "") {
    alert( "Please enter your address" );
    form.address1.focus();
    return false ;
  }
  
  if (form.town.value == "") {
    alert( "Please enter your town" );
    form.town.focus();
    return false ;
  }
  
  if (form.county.value == "") {
    alert( "Please enter your county" );
    form.county.focus();
    return false ;
  }
  
  if (form.postcode.value == "") {
    alert( "Please enter your postcode" );
    form.postcode.focus();
    return false ;
  }

  if (form.telephone_number.value == "") {
    alert( "Please enter your telephone number" );
    form.telephone_number.focus();
    return false ;
  }
  if (form.email_address.value == "") {
    alert( "Please enter your email address" );
    form.email_address.focus();
    return false ;
  }
  
  if (form.email_address.value.indexOf("@")<3) {
    alert( "Please ensure your email addresses have been input correctly e.g. mail@mail.com" );
    form.email_address.focus();
    return false ;
  }
  
  if (form.postcode.value == "") {
    alert( "Please enter your postcode" );
    form.postcode.focus();
    return false ;
  }
  // ** END **
  return true ;
}

function validate(form){
 var description_of_condition = form.description_of_condition.value;
 var declare = form.declare.checked;

 if (description_of_condition.length === 0) {
  alert("You must enter a description of your condition");
  return false;
 }
 
 if (!declare === true) {
  alert("You must declare that you claim relief from VAT");
  return false;
 }

 return true;
}

function validate2(form){
 var agree = form.agree.checked;
 
 if (!agree === true) {
  alert("You must agree to our terms");
  return false;
 }

 return true;
}