JavaScript: Round decimal

roundDecimal.js

/*
 * Simple script to correctly round up 2 decimal numbers.
 * Helpful in handling currencies that use 2 decimal place.
 * Will ensure 2 decimal places, even when ending in zeros.
 * v = value to be rounded.
 */
function roundTwoDecimals (v) {
	if (typeof(v) !== 'number') {
		return alert('v must be a number!');
	} else {
		return (Math.round(v * Math.pow(10, 2)) / Math.pow(10, 2)).toFixed(2);
	}
}