$(document).ready(function(){
	$('#zipEnter').bind('keypress',function(k){
		
		function numerals(e){		
			if ([e.keyCode || e.which] == 8) {
				return true;
			}else
			if ([e.keyCode || e.which] < 48 || [e.keyCode || e.which] > 57) {
				e.preventDefault ? e.preventDefault() : e.returnValue = false;
			}
		};		
		
		if($('#zipEnter').val().length < 5){
			numerals(k);
		}else{
			if ([k.keyCode || k.which] == 8) {
				return true;
			}else{
				return false;
			}
		}

	});
	
	$('#zipClick').click(function(){
		if($('#zipEnter').val().length != 5){
			alert('Please enter a valid zip code');
		}else{
			location.href='zip.php?zip='+$('#zipEnter').val();
		}
		return false;
	});
	
});