function toggle_billing(chk){

	if (chk.checked == 0){
	    $('dl#billingaddresslist').show();
	}

	else if (chk.checked == 1){
		$('dl#billingaddresslist').hide();
	}

}

function toggle_itemisation(divID){
	
	if(document.getElementById(divID).className == "displayoff"){
		document.getElementById(divID).className = "displayon";
	}else{
		document.getElementById(divID).className = "displayoff";
	}
}