/**
* Function that enables/disables all fields on the billing section of the contact form.
**/
function toogleContactDetailsFormBilling() {
	if (document.forms["ContactDetailsForm"].isBillingDifferent.checked) {// if the isBillingDifferent checkBox is checked we enable the billing fields
		document.forms["ContactDetailsForm"].billingAddress.disabled=false;
		document.forms["ContactDetailsForm"].billingPostcode.disabled=false;
		document.forms["ContactDetailsForm"].billingCity.disabled=false;
		document.forms["ContactDetailsForm"].billingCountry.disabled=false;
		document.forms["ContactDetailsForm"].billingState.disabled=false;
	} else {// if not....disable the billing fields
		document.forms["ContactDetailsForm"].billingAddress.disabled=true;
		document.forms["ContactDetailsForm"].billingPostcode.disabled=true;
		document.forms["ContactDetailsForm"].billingCity.disabled=true;
		document.forms["ContactDetailsForm"].billingCountry.disabled=true;
		document.forms["ContactDetailsForm"].billingState.disabled=true;
	}
}

/**
* Function that disables the BillingCountry field on the billing section of the contact form.
**/
function disableContactDetailsFormBillingCountry( preform ) {
	if( preform )
		document.forms["ContactDetailsForm"].billingCountry.disabled=true;
}