function emailCheck (emailStr) {
	var emailPat=/^(.+)@(.+)$/
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
	var validChars="\[^\\s" + specialChars + "\]"
	var quotedUser="(\"[^\"]*\")"
	var atom=validChars + '+'
	var word="(" + atom + "|" + quotedUser + ")"
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
	var eMsg = "";
	
	
	var matchArray=emailStr.match(emailPat)
	if (matchArray==null) {
		eMsg = "Email address entered incorrectly.  Make sure address has an @ and the proper number of .'s ";
		return eMsg;
	}

	var user=matchArray[1]
	var domain=matchArray[2]

	if (user.match(userPat)==null) {
	    eMsg = "The username (which appears before @) of email address is invalid.";
	    return eMsg;
	}

	var domainArray=domain.match(domainPat)
	if (domainArray==null) {
		eMsg = "The domain name (which appears after @) of email address is invalid.";
	    return eMsg;
	}

	if (len<2) {
	   eMsg = "This email address is missing a hostname.";
	   return eMsg;
	}

	return "";
}

function validate(ff)
{

	var sMsg = "";
	var eMsg = emailCheck(ff.txtEmail.value);

	if (ff.txtCity.value == "") {
		sMsg += "- City \n";
	}
	if (ff.txtZip.value == "") {
		sMsg += "- Zip Code \n";
	}
	if (ff.txtEmail.value == "" || eMsg != "") {
		sMsg += "- Email \n";
		
		if ( eMsg != "") {
			sMsg += "  " + eMsg + "\n";
		}			
	}
	
	if (ff.txtComment.value == "") {
		sMsg += "- Question or comment \n";
    }
		
	
	if (sMsg != "") {
  		alert ("The following information is required: \n" + sMsg);
		return false;
		
	}
	
	return true;
}