function emailCheck(emailAddress) {
	if (!emailAddress) {
		return false;
	}
	var emailPat=/^(.+)@(.+)$/
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
	var validChars="\[^\\s" + specialChars + "\]"
	var quotedUser="(\"[^\"]*\")"
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
	var atom=validChars + '+'
	var word="(" + atom + "|" + quotedUser + ")"
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
	
	/* Begin with the coarse pattern to simply break up user@domain into
	   different pieces that are easy to analyze. */
	var matchArray = emailAddress.match(emailPat);
	if (matchArray == null) {
		return false;
	}
	var user = matchArray[1];
	var domain = matchArray[2];
	
	if (user.match(userPat) == null) {
		return false;
	}
	var IPArray = domain.match(ipDomainPat);
	var domain_errors = 0;
	if (IPArray != null) {
		for (var i=1;i<=4;i++) {
			if (IPArray[i]>255) {
				return false;
			}
		}
	}
	
	var domainArray = domain.match(domainPat);
	if (domainArray == null) {
		return false;
	}
	var atomPat = new RegExp(atom,"g");
	var domArr = domain.match(atomPat);
	var len = domArr.length;
	if (domArr[domArr.length-1].length < 2 || domArr[domArr.length-1].length > 3) {
		return false;
	}
	if (len < 2) {
		return false;
	}
	return true;
}

function formCheck() {

	var errors = 0;
	var alert_text = '';
	
	// check for first name, then last name
	if (!document.webform.first_name.value && document.webform.f_name_req.value == 1) {
		errors++;
		alert_text += 'You must enter your first name.\n';
	}
		
	if (!document.webform.last_name.value && document.webform.l_name_req.value == 1) {
		errors++;
		alert_text += 'You must enter your last name.\n';
	}

	// check for company name
	if (!document.webform.company_name.value && document.webform.company_name_req.value == 1) {
		errors++;
		alert_text += 'You must enter your company\'s name.\n';
	}
  // check for email address existence
	if (!emailCheck(document.webform.email.value) && document.webform.email_req.value == 1) {
		errors++;
		alert_text += 'Your email address is missing or invalid.\n';
	}
	
	// check for street address
	if (!document.webform.street.value && document.webform.street_req.value == 1) {
		errors++;
		alert_text += 'Please give us your street address.\n';
	}
	
	// check for city
	if (!document.webform.city.value && document.webform.city_req.value == 1) {
		errors++;
		alert_text += 'Please give us your city.\n';
	}
	
	// check for state
	if (!document.webform.state.value && document.webform.state_req.value == 1) {
		errors++;
		alert_text += 'Please give us your state/province.\n';
	}
	
	// check for zip
	if (!document.webform.zip.value && document.webform.zip_req.value == 1) {
		errors++;
		alert_text += 'Please give us your zip/postal code.\n';
	}
	
	// check for country
	if (!document.webform.country.value && document.webform.country_req.value == 1) {
		errors++;
		alert_text += 'Please tell us your country.\n';
	}

	// check for phone
	if (!document.webform.phone.value && document.webform.phone_req.value == 1) {
		errors++;
		alert_text += 'Please tell us your phone number.\n';
	}
	// check for fax
	if (!document.webform.fax.value && document.webform.fax_req.value == 1) {
		errors++;
		alert_text += 'Please tell us your fax number.\n';
	}
	
  // check for aboutcamino
	if (!document.webform.aboutcamino.value && document.webform.aboutcamino_req.value == 1) {
		errors++;
		alert_text += 'Please tell us how you heard about us.\n';
	}
	
	// check for comment
	if (!document.webform.comments.value && document.webform.comments_req.value == 1) {
		errors++;
		alert_text += 'You must enter a comment/question.\n';
	}

	if (errors > 0) {
		alert(alert_text);
		return false;
	} else {
		return true;
	}
}