/******************
 * Validation Object
 */

function validateEmail(emailStr, showAlerts, callbackFunction) {

    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) {
        if (showAlerts) {
            if (callbackFunction) {
                callbackFunction("Email address seems incorrect (check @ and .'s)");
            } else {
                alert("Email address 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) {
            if (showAlerts) {
                if (callbackFunction) {
                    callbackFunction("Ths username contains invalid characters.");
                } else {
                    alert("Ths username contains invalid characters.");
                }
            }
            return false;
        }
    }

    for (i = 0; i < domain.length; i++) {
        if (domain.charCodeAt(i) > 127) {
            if (showAlerts) {
                if (callbackFunction) {
                    callbackFunction("Ths domain name contains invalid characters.");
                } else {
                    alert("Ths domain name contains invalid characters.");
                }
            }
            return false;
        }
    }

    if (user.match(userPat) == null) {
        if (showAlerts) {
            if (callbackFunction) {
                callbackFunction("The username doesn't seem to be valid.");
            } else {
                alert("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) {
                if (showAlerts) {
                    if (callbackFunction) {
                        callbackFunction("Destination IP address is invalid!");
                    } else {
                        alert("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) {
            if (showAlerts) {
                if (callbackFunction) {
                    callbackFunction("The domain name does not seem to be valid.");
                } else {
                    alert("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) {
        if (showAlerts) {
            if (callbackFunction) {
                callbackFunction("The address must end in a well-known domain or two letter " + "country.");
            } else {
                alert("The address must end in a well-known domain or two letter " + "country.");
            }
        }
        return false;
    }

    if (len < 2) {
        if (showAlerts) {
            if (callbackFunction) {
                callbackFunction("This address is missing a hostname!");
            } else {
                alert("This address is missing a hostname!");
            }
        }
        return false;
    }

    return true;

}

// simple number validation handles decimals and , 
function validateIsNumber(num) {
	var validChars = "0123456789.,";
	var isNumber=true;
	var myChar;
	for (i = 0; i < num.length && isNumber == true; i++) { 
		myChar = num.charAt(i);
		if (validChars.indexOf(myChar) == -1) {
			isNumber = false;
		}
	}
	return isNumber;
}