function emailCheck (emailStr, fieldName) {
	var checkTLD=1;
	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;
	var emailPat=/^(.+)@(.+)$/;
	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 +")*$");
	var matchArray=emailStr.match(emailPat);
	if (matchArray==null) {
		alert(fieldName + " seems incorrect (check @ and .'s)");
			return false;
		}
	var user=matchArray[1];
	var domain=matchArray[2];
	for (i=0; i<user.length; i++) {
		if (user.charCodeAt(i)>127) {
			alert(fieldName + ": The username contains invalid characters.");
				return false;
		   }
	}
	for (i=0; i<domain.length; i++) {
		if (domain.charCodeAt(i)>127) {
			alert(fieldName + ": The domain name contains invalid characters.");
				return false;
		}
	}
	if (user.match(userPat)==null) {
		alert(fieldName + ": The username doesn't seem to be valid.");
			return false;
	}
	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null) {
		for (var i=1;i<=4;i++) {
			if (IPArray[i]>255) {
				alert(fieldName + ": Destination IP address is invalid!");
					return false;
			}
		}
		return true;
	}
	var atomPat=new RegExp("^" + atom + "$");
	var domArr=domain.split(".");
	var len=domArr.length;
	for (i=0;i<len;i++) {
		if (domArr[i].search(atomPat)==-1) {
			alert(fieldName + ": The domain name does not seem to be valid.");
		return false;
	   }
	}
	if (checkTLD && domArr[domArr.length-1].length!=2 && domArr[domArr.length-1].search(knownDomsPat)==-1) {
		alert(fieldName + ": The address must end in a well-known domain or two letter " + "country.");
			return false;
	}
	if (len<2) {
		alert(fieldName + ": This address is missing a hostname!");
			return false;
	}
	return true;
}

function validRequired(formField,fieldLabel) {
	var result = true;
	if (formField.value == "") {
		alert('Please enter a value for the "' + fieldLabel +'" field.');
		formField.focus();
		result = false;
	}
	return result;
}

function validSelectedOption(formField,fieldLabel){
	var result = true;
	if (formField.selectedIndex == -1 || formField.selectedIndex == 0) {
	    alert('Please select an option for the "' + fieldLabel +'" field.');
	    formField.focus();
    	result = false;
	}
	return result;
}