function removeTrip(trip) {
	window.location = window.location + '&removeTrip=' + trip;
}	
function applyPromo(code) {
	new Request.HTML({
			url: 'dmw/ajax/setPromo.php',
			method: 'post',
			data: {
				code: code,
				session_id: session_id
			},
			onComplete: function(a,b,html) {
				//console.log(html);
				if (html=='success') {
					window.location = window.location;
				} else {
					alert(html);
					$('promo_code').value = '';
				}
			}
	}).send();
}
function removePromo() {
	new Request.HTML({
			url: 'dmw/ajax/removePromo.php',
			method: 'post',
			data: {
				session_id: session_id
			},
			onComplete: function(a,b,html) {
				window.location = window.location;
			}
	}).send();
}