function CheckData(form) {
	var pass = true;

	if (pass) {
		pass = PostCode(form.outcode,form.incode, 'Please enter your postcode.');
	}
	if (pass) {
		pass = TextBox(form.volume, 'Please enter the volume of fuel required.');
	}
	if (pass) {
		pass = Select(form.customer, 'Please select what type of user you are.');
	}
	if (pass) {
		pass = Select(form.fueltype, 'Please select what fuel type you require.');
	}
	if (pass) {
		pass = Email(form.email, 'Please enter a valid email address.');
	}
	if (pass) {
		form.submit();
	}
}