function validateBasicForm() {
	
	var answered = false;
	var multiAnswer = 0;
	
	//customer information
	if (document.SurveyForm.residential_name_first.value == '') {
		alert('You must fill in your First Name.');
		document.SurveyForm.residential_name_first.focus();
		return false;
	}
	if (document.SurveyForm.residential_name_last.value == '') {
		alert('You must fill in your Last Name.');
		document.SurveyForm.residential_name_last.focus();
		return false;
	}
	if (document.SurveyForm.email.value == '') {
		alert('You must fill in your email address.');
		document.SurveyForm.email.focus();
		return false;
	}
	if (document.SurveyForm.residential_address.value == '') {
		alert('You must fill in a valid Residential Address.');
		document.SurveyForm.residential_address.focus();
		return false;
	}
	
	if (document.SurveyForm.residential_city.value == '') {
		alert('You must fill in the City.');
		document.SurveyForm.residential_city.focus();
		return false;
	}
	if (document.SurveyForm.residential_state.value == '') {
		alert('You must fill in your State.');
		document.SurveyForm.residential_state.focus();
		return false;
	}
	if (document.SurveyForm.residential_zip.value == '') {
		alert('You must fill in your Zip Code.');
		document.SurveyForm.residential_zip.focus();
		return false;
	}
	if (checkAlpha(document.SurveyForm.residential_zip)){
		alert('The Zip Code you entered is invalid.');
		document.SurveyForm.residential_zip.focus();
		return false;
	}
	
//	if (document.SurveyForm.business_name.value == '') {
//		alert('You must fill in your Business Name.');
//		document.SurveyForm.business_name.focus();
//		return false;
//	}
//	if (document.SurveyForm.business_address.value == '') {
//		alert('You must fill in a valid Business Address.');
//		document.SurveyForm.business_address.focus();
//		return false;
//	}
//	if (document.SurveyForm.business_city.value == '') {
//		alert('You must fill in a valid Business City.');
//		document.SurveyForm.business_city.focus();
//		return false;
//	}
//	if (document.SurveyForm.business_state.value == '') {
//		alert('You must fill in your Business State.');
//		document.SurveyForm.business_state.focus();
//		return false;
//	}
//	if (document.SurveyForm.business_zip.value == '') {
//		alert('You must fill in your Business Zip Code.');
//		document.SurveyForm.business_zip.focus();
//		return false;
//	}
//	if (checkAlpha(document.SurveyForm.business_zip)){
//		alert('The Business Zip Code you entered is invalid.');
//		document.SurveyForm.business_zip.focus();
//		return false;
//	}

}

function checkAlpha(field) {
	string = field.value;
	var Chars = "0123456789";

    for (var i = 0; i < string.length; i++) {
       if (Chars.indexOf(string.charAt(i)) == -1){
			return true;          
       }
    }
    return false;
}
function checkEmail(field) {
	string = field.value;
 	if (string.indexOf(' ')==-1 
      	&& 0<string.indexOf('@')
      	&& string.indexOf('@')+1 < string.length){
			return false;
	}
 	return true;
}