function update_details() {
	var details = document.theform.getElementsByTagName('select');
	var url = '';
	var input = '&';
	if(details) {
		for(var i = 0; i<details.length; i++) {
			input = input + details[i].name + '=' + details[i].options[details[i].selectedIndex].value + '&';
		}
		// Add vehicle detail
		input = input + 'vehicle=' + document.theform.vehicle.value;
		
		switch(document.theform.vehicle_class.value) {
			case 'automotive':
				url = 'index.php?page=automotive-details';
				break;
			case 'motorhome':
				url = 'index.php?page=motorhome-details';
				break;
			case 'mediumduty':
				url = 'index.php?page=mediumduty-details';
				break;
			case 'heavyduty':
				url = 'index.php?page=heavyduty-details';
				break;
			default:
				url = 'index.php';
		}
		document.location.href = url + input;
	}
}