strong password validation form, auto update as you type

password.js

var atLeastOneLetter = /.*[a-zA-Z]{1,}.*/;
var atLeastOneNumberOrSpecialChar = /.*[0-9\\\(\)\[\]\{\}\-\+\=\,\?\"_`:@'#*$;^!|~/\.]{1,}.*/;
var atLeastOneSpace = /.*[ ]{1,}.*/;
var specialChars =  /(?=.*[><&%]).{1,}/;
var imgPath = 'images/';
var check_IMG = imgPath + 'check16.gif';
var wrong_IMG = imgPath + 'wrong16.gif';
var clear_IMG = imgPath + 'clear16.gif';
var passwordTipPopupId = 'passwordTipPopup';
var pwdTipImagesId = 'pwdTip';
var newPasswordFieldId = 'changePassword_newPasswordId';

function checkPassword() {
	toggleOnPopup(passwordTipPopupId);
	validatePassword('true',"");
}

function onBlurNewPassword() {
	toggleOffPopup(passwordTipPopupId);
}

function toggleOffPopup(popupId) {
	var popup = $('#' + popupId);
	popup.hide();
}

function toggleOnPopup(popupId) {
	var parent = $('#' + newPasswordFieldId).parent();
	var pwPopup = $('#' + passwordTipPopupId);
	pwPopup.remove();
	parent.append(pwPopup);
	$('#' + passwordTipPopupId).css({display: 'block'});
}

function validateChangePassword(invalidPwdMsg,newPwdErrorMsgs,confirmPwdMsg) {
	var isValidCurrentPwd = validateCurrentPassword(invalidPwdMsg);
	var isValidPwd = validatePassword('false',newPwdErrorMsgs);
	var isValildConfirmPassword = valildateConfirmPassword(invalidPwdMsg,confirmPwdMsg);
	validChangePassword = isValidCurrentPwd && isValidPwd && isValildConfirmPassword;
	setFocus(isValidCurrentPwd,isValidPwd,isValildConfirmPassword);
	return validChangePassword;
}
function setFocus(isValidCurrentPwd,isValidPwd,isValildConfirmPassword){
	if(!isValidCurrentPwd){
		$w("changePassword.currentPassword").widgetDiv.find('input').focus();
	}else if(!isValidPwd){
		$w("changePassword.newPassword").widgetDiv.find('input').focus();
	}else if(!isValildConfirmPassword){
		 $w("changePassword.confirmNewPassword").widgetDiv.find('input').focus();
	}else{
		$w("changePassword.currentPassword").widgetDiv.find('input').focus();
	}
	}
	
function validateCurrentPassword(rqdPwdMsg) {
	var widget = $w("changePassword.currentPassword");
	if(isEmpty(widget.getValue())) {
		widget.setMessage(rqdPwdMsg); 
		return false;
	}
	widget.setMessage("");
	return true;
}

function valildateConfirmPassword(invalidPwdMsg,confirmPwdMsg) {
	var newPwWidget = $w("changePassword.newPassword");
	var confirmPwWidget = $w("changePassword.confirmNewPassword");
	var newPassword = newPwWidget.getValue();
	var confirmPassword = confirmPwWidget.getValue();
	if(isEmpty(confirmPassword) && isEmpty(newPassword)) {
		newPwWidget.setMessage(invalidPwdMsg); 
		confirmPwWidget.setMessage(invalidPwdMsg); 
		return false;
	}
    if(newPassword != confirmPassword) {
        confirmPwWidget.setMessage(confirmPwdMsg); 
       return false;
    }          
    return true;
}

function validatePassword(isSwapImg,newPwdErrorMsgs) {
	var widget = $w("changePassword.newPassword");
	var pwdValue = widget.getValue();
	var newPwdErrorMsgArr = newPwdErrorMsgs.split('|');
	widget.setMessage(""); 
	if(isEmpty(pwdValue) && isSwapImg == 'false') {
		widget.setMessage(newPwdErrorMsgArr[0]); 
		return false;
	}
	var pwdTipsCnt = $('[name="pwdTip"]').length;
	var custIdVal = $('[name="changePassword.customerId"]:eq(0)').val();
	var result = 0;
	var isErrorMessageDisplayed = false;
	var noSpecialCharsValid = !(specialChars.test(pwdValue));
    result = result + (noSpecialCharsValid ? 0 : 1); 
    if(result != 0  && isSwapImg == 'false') {
    	widget.setMessage(newPwdErrorMsgArr[1]); 
    	return false;
    }
	for(var i = 1; i <= pwdTipsCnt; i++) {
        switch(i) {
            case 1: var pwdSizeValid = pwdValue.length >= 8 && pwdValue.length <= 35; 
            		result = result + (pwdSizeValid ? 0 : 1); 
            		if(isSwapImg == 'true') {
            			swapImage(pwdTipImagesId +i,pwdSizeValid);
            		} 
            		else if(result != 0 && !isErrorMessageDisplayed) {
            			widget.setMessage(newPwdErrorMsgArr[2]); 
            			isErrorMessageDisplayed = true;
            			
            		}
            		break;
            case 2: var atleastOneAlphaValid = atLeastOneLetter.test(pwdValue);
            		result = result + (atleastOneAlphaValid ? 0 : 1); 
            		if(isSwapImg == 'true') {
            			swapImage(pwdTipImagesId +i,atleastOneAlphaValid);
            		}
            		else if(result != 0 && !isErrorMessageDisplayed) {
            			widget.setMessage(newPwdErrorMsgArr[3]); 
            			isErrorMessageDisplayed = true;
            			
            		} 
            		break;
            case 3: var atLeastOneNumberOrSpecialCharValid = atLeastOneNumberOrSpecialChar.test(pwdValue);
            		result = result + (atLeastOneNumberOrSpecialCharValid ? 0 : 1); 
            		if(isSwapImg == 'true') {
            			swapImage(pwdTipImagesId +i,atLeastOneNumberOrSpecialCharValid);
            		}
            		else if(result != 0 && !isErrorMessageDisplayed) {
            			widget.setMessage(newPwdErrorMsgArr[4]);
            			isErrorMessageDisplayed = true;
            			
            		} 
            		break;
            case 4: var noSpacesValid = !(atLeastOneSpace.test(pwdValue));
            		result = result + (noSpacesValid ? 0 : 1); 
            		if(isSwapImg == 'true') {
            			swapImage(pwdTipImagesId +i,noSpacesValid);
            		}
            		else if(result != 0 && !isErrorMessageDisplayed) {
            			widget.setMessage(newPwdErrorMsgArr[5]); 
            			isErrorMessageDisplayed = true;
            			
            		} 
            		break;
            case 5: var noCustIdValid = !(pwdValue.indexOf(custIdVal) >= 0);
            		result = result + (noCustIdValid ? 0 : 1); 
            		if(isSwapImg == 'true') {
            			swapImage(pwdTipImagesId +i,noCustIdValid);
            		}
            		else if(result != 0 && !isErrorMessageDisplayed) {
            			widget.setMessage(newPwdErrorMsgArr[6]); 
            			isErrorMessageDisplayed = true;
            			
            		}
            		break;
            case 6: var noRepeatingCharValid = !(testForRepeating(pwdValue));
            		result = result + (noRepeatingCharValid ? 0 : 1);
            		if(isSwapImg == 'true') {
            			swapImage(pwdTipImagesId +i,noRepeatingCharValid);
            		}
            		else if(result != 0 && !isErrorMessageDisplayed) {
            			widget.setMessage(newPwdErrorMsgArr[7]); 
            			isErrorMessageDisplayed = true;
            			
            		} 
            		break;
            default: 
            		 break;
        }
    }    
    return result == 0;    
}

function testForRepeating(x) {
	var letters = [];
	for (var i=1; i <= x.length; i++) {
		letters[i] = x.substring(i-1, i);
	}
	var maxRepeat = Math.floor(x.length/2);	
	
	var repeatingCharactersPattern = new RegExp(/([\w|\W])\1{2,}/);

	if(repeatingCharactersPattern.test(x.toLowerCase())){
		return true;
	}
	var num = 0;
	for (var i=1; i< letters.length; i++) {
		if(letters[i-1] == letters[i]) {
			if (num == 0) { 
				num = 2; 
			} else { 
				num++; 
			}		
			if (num > maxRepeat) {
				return true;
			}
		} else {
			num = 0;
		}
	}
	return false;
}

function swapImage(myImg, bool) {     
    var myImage = document.getElementById(myImg);
    if (bool) {
        document.images[myImg].src = check_IMG;
    }
    else {
        if(document.images[myImg].src.indexOf(check_IMG) >-1 || document.images[myImg].src.indexOf(wrong_IMG) >-1) {
            document.images[myImg].src = wrong_IMG;
        } else {
            document.images[myImg].src = clear_IMG;
        }
    }
    return bool;
}

function isEmpty(value) {
	if (value.length == 0) 
	{
	    return true;
	}
	    return false;
}

function updateOnKeyDown(evt) {
	if (!isObject(evt)) {
		evt = window.event;
	}
	var keyCode = evt.keyCode;
	if(keyCode === SFXKEYS.ENTER) {
  		buttons.get('updateButton').fireOnClick();
	}
	return true;
}

function changePasswordOnload() { 
	loadWebtrendsErrorMsg();  
	$w("changePassword.currentPassword").widgetDiv.find('input').focus();
	$w('changePassword.currentPassword').clear();
	$w('changePassword.newPassword').clear();
	$w('changePassword.confirmNewPassword').clear();
}

function loadWebtrendsErrorMsg() {   
	var errorMessageTxt = $('#errorMsgTxtId');
	var webTrendsMessageTxt = $('[name="changePassword.webTrendsErrorMsg"]:eq(0)');
	if(errorMessageTxt!=null) {
		var txt = errorMessageTxt.html();
		webTrendsMessageTxt.val(txt);
		
	}
}  

load(function() {
	changePasswordOnload();
    $('#sfMain input').bind("keydown", updateOnKeyDown);
});