var regexAlpha = new RegExp("[A-z]");
var regexNum = new RegExp("[0-9]");
var regexAlphaNum = new RegExp("[A-z0-9]");
var regexPostcode = new RegExp("^[a-zA-Z0-9\\s]{2,}$");
//var regexDate = new RegExp("^(([1-9])|(0[1-9])|(1[0-2]))\\/((0[1-9])|([1-31]))\\/((\\d{2})|(\\d{4}))$");
var regexEmail = new RegExp("^[\\w-]+(\\.[\\w-]+)*@([\\w-]+\\.)+[a-zA-Z]{2,7}$");
var regexPhone = new RegExp('^((\\(?0\\d{4}\\)?\\s?\\d{3}\\s?\\d{3})|(\\(?0\\d{3}\\)?\\s?\\d{3}\\s?\\d{4})|(\\(?0\\d{2}\\)?\\s?\\d{4}\\s?\\d{4}))(\\s?\\#(\\d{4}|\\d{3}))?$');
var regexMobile = new RegExp('^(\\+44\\s?7\\d{3}|\\(?07\\d{3}\\)?)\\s?\\d{3}\\s?\\d{3}$');
var validationSummaryContent = '';

function validateFormnews() {
	//alert('Validate Form - Start');
    validationSummaryContent = '';
    var formValid = true;
    var validationSummary = document.getElementById('ValidationSummarynews');
	//alert('Get Validation Summary');
	//if (!validateDropdown('ddlTitle', 'Title_text', 'title_error', true, 'Please select your title')) { formValid = false; }
	//alert('Validate DDL');
    if (!validateTextbox('FullName', 'Fullname_text', 'fullname_error', true, 'alpha', 'Please enter your full name.')) { formValid = false; }
	//alert('Validate Fullname');
    //if (!validateTextbox('Surname', 'Surname_text', 'surname_error', true, 'alpha', 'Please enter your Surname.')) { formValid = false; }
	//alert('Validate Surname');
	if (!validateTextbox('Email', 'Email_text', 'email_error', true, 'alphanumeric', 'Please enter your email address.')) { formValid = false; }
	//alert('Validate Email');
    
    if (!formValid) {
        validationSummary.innerHTML = '';
        validationSummary.className = 'validationsummarynewsshow';
        validationSummary.innerHTML = '<ul>' + validationSummaryContent + '</ul>';
    } else {
        validationSummary.className = 'validationsummarynewshidden';
    }
    
    return formValid;
}

function validateDropdown(ddlId, questionId, errorId, isRequired, errormsg) {
	var result = true;
	var objDdl = document.getElementById(ddlId);
	var objQuestion = document.getElementById(questionId);
    var objError = document.getElementById(errorId);
	//alert(objDdl.selectedIndex);
	
	if (isRequired && objDdl.selectedIndex == 0) {
		//alert('5');
		objQuestion.className = 'invalidentry';
		//alert('6');
		objError.className = 'errormsg_show';
		//alert('7');
		validationSummaryContent = validationSummaryContent + '<li>' + errormsg + '</li>';
		//alert('8');
		return false;
	} else {
		//alert('8');
		objQuestion.className = '';
		//alert('9');
        objError.className = 'errormsg_hidden';
		//alert('10');
        return true;
	}
}

function validateTextbox(tbId, questionId, errorId, isrequired, alphanumeric, errormsg) {
	//alert('validate textbox');
    var result = true;
    //alert(tbId);
	var objtb = document.getElementById(tbId);
	//alert(objtb);
    var objQuestion = document.getElementById(questionId);
    var objError = document.getElementById(errorId);

    if (!isrequired && objtb.value.length > 0) {
        if (!regExTest(alphanumeric, objtb.value)) {
            objQuestion.className = 'invalidentry';
            objError.className = 'errormsg_show';
            validationSummaryContent = validationSummaryContent + '<li>' + errormsg + '</li>';
            return false;
        }
    } else if ((isrequired && objtb.value.length == 0) || (isrequired && objtb.value.length > 0 && !regExTest(alphanumeric, objtb.value))) {
        objQuestion.className = 'invalidentry';
        objError.className = 'errormsg_show';
        validationSummaryContent = validationSummaryContent + '<li>' + errormsg + '</li>';
        return false;
    } else {
        objQuestion.className = '';
        objError.className = 'errormsg_hidden';
        return true;
    }
}

function validateRadioButtons(rdList, questionId, errorId, isrequired, errormsg) {
	//alert('Validate Radio - Start');
    var objQuestion = document.getElementById(questionId);
	//alert('Get Question Obj');
    var objError = document.getElementById(errorId);
	//alert('Get Answer Obj');
    var isChecked = false;

    for (i = 0; i < rdList.length; i++) {
        var obj = document.getElementById(rdList[i]);
		//alert('obj-'+i);
        if (obj.checked) {
			//alert('checked');
            isChecked = true;
            break;
        }
    }
	
    if (!isChecked) {
		//alert('not checked');
        objQuestion.className = 'invalidentry';
		//alert('Set Question class name');
        objError.className = 'errormsg_show';
		//alert('Set answer class name');
        validationSummaryContent = validationSummaryContent + '<li>' + errormsg + '</li>';
		//alert('set error message');
    } else {
        objQuestion.className = '';
        objError.className = 'errormsg_hidden';
    }
	//alert('isChecked='+isChecked);
    return isChecked;
}

function regExTest(alphanumeric, testVal) {
    var regexresult;
    switch (alphanumeric.toString()) {
        case 'alpha':
            regexresult = regexAlpha.test(testVal);
            break;
        case 'numeric':
            regexresult = regexNum.test(testVal);
            break;
        case 'alphanumeric':
            regexresult = regexAlphaNum.test(testVal);
            break;
        case 'postcode':
            regexresult = regexPostcode.test(testVal);
            break;
        case 'dateofbirth':
            var validDoB = isDate(testVal);
            regexresult = validDoB;
            break;
    }

    return regexresult;
}

var objD = new Date();
var dtCh= "/";
var minYear=(objD.getFullYear() - 55);

function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}

function validateDate(tbId, questionId, errorId){
	var errorMsg;
	var isValid = true;
	var dtStr = document.getElementById(tbId).value;
	//alert('Get date value');
	var objQuestion = document.getElementById(questionId);
	//alert('Get question obj');
    var objError = document.getElementById(errorId);
	//alert('Get answer obj');
	var daysInMonth = DaysArray(12);
	var pos1=dtStr.indexOf(dtCh);
	var pos2=dtStr.indexOf(dtCh,pos1+1);
	var strDay=dtStr.substring(0,pos1);
	var strMonth=dtStr.substring(pos1+1,pos2);
	var strYear=dtStr.substring(pos2+1);
	strYr=strYear;
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	//alert('Day Check');
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	//alert('Month check');
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1);
	}
	//alert('Year check');
	month=parseInt(strMonth);
	//alert('parsemonth');
	day=parseInt(strDay);
	//alert('parseday');
	year=parseInt(strYr);
	//alert('parseyear');
	if (pos1==-1 || pos2==-1){
		//alert('incorrect date format1');
		errorMsg = "The date format should be : dd/mm/yyyy";
		//alert('incorrect date format2');
		objQuestion.className = 'invalidentry';
		//alert('incorrect date format3');
		objError.className = 'errormsg_show';
		//alert('incorrect date format4');
		validationSummaryContent = validationSummaryContent + '<li>' + errorMsg + '</li>';
		//alert('incorrect date format5');
		isValid = false;
		//alert('incorrect date format6');
	}
	if (strMonth.length<1 || month<1 || month>12){
		//alert('incorrect month');
		errorMsg = "Date of Birth month is invalid";
		objQuestion.className = 'invalidentry';
		objError.className = 'errormsg_show';
		validationSummaryContent = validationSummaryContent + '<li>' + errorMsg + '</li>';
		isValid = false;
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		//alert('incorrect day');
		errorMsg = "Date of Birth year is invalid";
		objQuestion.className = 'invalidentry';
		objError.className = 'errormsg_show';
		validationSummaryContent = validationSummaryContent + '<li>' + errorMsg + '</li>';
		isValid = false;
	}
	if (strYear.length != 4 || year==0 || year>minYear){
		//alert('incorrect year or not old enough');
		errorMsg = "You must be 55 years of age.";
		objQuestion.className = 'invalidentry';
		objError.className = 'errormsg_show';
		validationSummaryContent = validationSummaryContent + '<li>' + errorMsg + '</li>';
		isValid = false;
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		//alert('incorrect date format2');
		errorMsg = "Please enter a valid date of birth";
		objQuestion.className = 'invalidentry';
		objError.className = 'errormsg_show';
		validationSummaryContent = validationSummaryContent + '<li>' + errorMsg + '</li>';
		isValid = false;
	}
	
	if (isValid) {
		objQuestion.className = '';
		objError.className = 'errormsg_hidden';
	}
	//alert('IsDateValid='+isValid);
	return isValid;
}