function isCanadaOrUSpostal(postal) {
	if (postal.match(/^\d{5}$/))
		return 'US';
	else if (postal.toUpperCase().match(/^[A-Z]{1}\d{1}[A-Z]{1}[ -\.]{0,1}\d{1}[A-Z]{1}\d{1}$/))
		return 'CA';
	else return false;
}

window.addEvent('domready', function(){
	if($('breakfastLocatorForm') != null) {
		$('breakfastLocatorForm').addEvent('submit', function(e){
			new Event(e).stop();

			// variables setup
			var url = '';
			var zip = $('zipCode').value;
			var addr = '';
			var city = '';
			var st = '';
			var radius = 5;
			var country = isCanadaOrUSpostal(zip); 

			// test zip validation
			if (!zip || zip == '' || isCanadaOrUSpostal(zip) == false) {
				$('errorInZip').innerHTML = 'Please enter a valid zip';
				$('errorInZip').setStyle('display', 'block');
				return;
			} else {
				$('errorInZip').innerHTML = '';
				$('errorInZip').setStyle('display', 'none');
			}
			
			// setup URL
			url += 'advantagecallback.jsp';
			url += '?transaction=search';
			url += '&pWidth=400';
			url += '&iconID=31';
			url += '&proxIconId=400';
			url += '&ambiguities=0';
			url += '&postalCode=' + zip;
			url += '&radius=' + radius;
			url += '&address=' + addr;
			url += '&city=' + city;
			url += '&state=' + st;
			url += '&country=' + country;
			return open(url, "a", "toolbar=no,menubar=no,location=no,scrollbars=yes,resizable=no,width=830,height=700");
		});
	}
});