/**
checks that the something from the dropdownlist is chosen
**/
function valTestDDL(sender, args) {
    var controlToValidate = document.getElementById(sender.controltovalidate);
    //    args.IsValid = !controlToValidate.options[0].selected;
    if (controlToValidate.selectedIndex == 0) {
        args.IsValid = false;
    }
    else {
        args.IsValid = true;
    }
}

/**
to check the values of the dates, 
that some date has been selected. Use this
in customValidator in ClientValidateFunction
*/
function valTestDate_ClientValidate(sender, args) {
    var controlToValidate = document.getElementById(sender.controltovalidate);
    args.IsValid = isDate(controlToValidate.value);
}

/**
* DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
*/
// Declaring valid date character, minimum year and maximum year
var dtCh = ".";
var minYear = 1900;
var maxYear = 2100;

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
}

/**
we just check, if any of the parts of date have "_" in their field and
if they have, that means that the fields haven't been filled
*/
function isDate(dtStr) {
    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);
    if (strDay.charAt(0) == "_" || strMonth.charAt(0) == "_" || strYear.charAt(0) == "_" ||
        strDay.charAt(1) == "_" || strMonth.charAt(1) == "_" || strYear.charAt(1) == "_" ||
                                                                strYear.charAt(2) == "_" ||
                                                                strYear.charAt(3) == "_")
        return false;
        
    if (strDay > 31 || strMonth > 12 || strYear > 2100 || strYear < 1900)
        return false;
    return true;
}


/**
this is to check that the payment type has been chosen by the client
**/
function valTestPaymentType_ClientValidate(sender, args) {
    var invoice     = document.getElementById("ctl00_ContentMain_rbPaymentType_Invoice");
    var creditCard  = document.getElementById("ctl00_ContentMain_rbPaymentType_CreditCard");
    args.IsValid    = (invoice.checked || creditCard.checked);
}

/**
this is to check, if the client has checked the terms and conditions checkbox
**/
function valTestTermsAndConditions_ClientValidate(sender, args) {
    var controlToValidate   = document.getElementById("ctl00_ContentMain_chbTermsAndConditions");
    args.IsValid            = (controlToValidate.checked == true);
}