// JavaScript Document
function roundNumber(num, dec) {
	var result = Math.round(num*Math.pow(10,dec))/Math.pow(10,dec);
	return result.toFixed(2);
}

function updateShippingTotal(shipping,total){
	var cost = roundNumber(parseFloat(shipping) + parseFloat(total),2);
	document.getElementById('shippingTotal').innerHTML = cost;
}