function checkForm() {
	var zip = false;
	var locale = false;
	var state = false;

	var f = document.zbSearch;

	if(f.zipcode.value == null || f.zipcode.value == ""){
		zip = false;
	} else {
		zip = true;
	}
	if(f.locale.value == null || f.locale.value == ""){
		locale = false;
	} else {
		locale = true;
	}
	if(f.state.selectedIndex == 0){
		state = false;
	} else {
		state = true;
	}

	if(zip){
		return true;
	} else if(!locale && !state){
		alert("Please enter a value to search on");
		f.zipcode.focus();
		return false;
	} else if(!locale){
		alert("Please select a town to focus your search on");
		f.locale.focus();
		return false;
	} else if(!state){
		alert("Please specify which state or province to search in");
		f.state.focus();
		return false;
	} else {
		return true;
	}
}