/* **********************************************************
	*
	*	emailCheck
	*
	************************************************************/

function emailCheck (emailStr) {
	//alert(emailStr);
	
	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) {
		error_message = "(check @ and .'s)";
		return false;
	}
	var user=matchArray[1];
	var domain=matchArray[2];

	if (user.match(userPat)==null) {
		error_message = "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) {
				error_message = "Destination IP address is invalid!";
				return false;
			}
		}
		return true;
	}

	var domainArray=domain.match(domainPat)
	if (domainArray==null) {
		error_message = "The domain name doesn't seem to be valid.";
		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) {
	   error_message = "The address must end in a three-letter domain, or two letter country.";
	   return false;
	}

	if (len<2) {
	   var errStr="This address is missing a hostname!"
	   error_message = errStr;
	   return false;
	}

	return true;
}