function enableField() {
	if(document.theform.brochure.checked) {
	document.theform.addressone.disabled=false;
	document.theform.postcode.disabled=false;
	}
	else {
	document.theform.addressone.disabled=true;
	document.theform.postcode.disabled=true;
	}
}

function disableField() {
	if(document.theform.thirty_minutes.checked) {
	document.theform.time.disabled=true;
	}
	else {
	document.theform.time.disabled=false;
	}
}