function swapImage(id, swapFile) {
	document.getElementById(id).setAttribute('src', swapFile);
}

function updateDailyRate(id) {
	var current = document.getElementById('daily_rate_box').innerHTML;
	
	current = Number(current.replace(',', '').replace('$', ''));
	
	if (document.getElementById('package_'+id).checked) {
		current = current + Number(document.getElementById('price_'+id).innerHTML);
	} else {
		current-=document.getElementById('price_'+id).innerHTML;
	}
	
	current = addCommas(current.toFixed(2));
	
	document.getElementById('daily_rate_box').innerHTML = '$'+current;
}

function updateInsurance(id) {
	
}

function addCommas(nStr) {
	nStr += '';
	x = nStr.split('.');
	x1 = x[0];
	x2 = x.length > 1 ? '.' + x[1] : '';
	var rgx = /(\d+)(\d{3})/;
	while (rgx.test(x1)) {
		x1 = x1.replace(rgx, '$1' + ',' + '$2');
	}
	return x1 + x2;
}

function selectScroll(id) {
	Effect.ScrollTo(document.getElementById(id).value);
}