var error_color = "#FF0000";
var success_color = "#FFFFFF";

function QueryString() {
    var qs = window.location.search.substring(1);

    var idx = -1, oldIdx, name, value, ret = new Object();

    for (; ; ) {

        oldIdx = idx + 1;

        idx = qs.indexOf('=', idx);

        if (idx == -1) break;

        name = qs.substring(oldIdx, idx);

        oldIdx = idx + 1;

        idx = qs.indexOf('&', idx + 1);

        if (idx == -1) {
            value = qs.substring(oldIdx);
            ret[name] = value;
            break;
        }
        else {
            value = qs.substring(oldIdx, idx);

            ret[name] = value;
        }
    }

    return ret;
}

function Trim(str) { return str.replace(/^\s+|\s+$/g, ""); }

function Validate(textbox, label, filter) {
    if (Trim(textbox.value) == "") {
        label.style.color = error_color;
        $("#RequiredFiels").css("display", "block");
        return false;
    }
    else {
        if (filter != undefined) {
            if (!filter.test(textbox.value)) {
                label.style.color = error_color;
                $("#RequiredFiels").css("display", "block");
                return false;
            }
            else {
                label.style.color = success_color;
                return true;
            }
        }
        else {
            label.style.color = success_color;
            return true;
        }
    }
}

function set_cookie(name, value, exp_date, path, domain, secure) {
    var cookie_string = name + "=" + escape(value);

    if (exp_date)
        cookie_string += "; expires=" + exp_date.toGMTString();

    if (path)
        cookie_string += "; path=" + escape(path);

    if (domain)
        cookie_string += "; domain=" + escape(domain);

    if (secure)
        cookie_string += "; secure";

    document.cookie = cookie_string;
}


function get_cookie(cookie_name) {
    var results = document.cookie.match('(^|;) ?' + cookie_name + '=([^;]*)(;|$)');

    if (results)
        return (unescape(results[2]));
    else
        return null;
}

function delete_cookie(cookie_name) {
    var cookie_date = new Date();  // current date & time
    cookie_date.setTime(cookie_date.getTime() - 1);
    document.cookie = cookie_name += "=; expires=" + cookie_date.toGMTString();
}

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
}

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)
    strYr = strYear
    if (strDay.charAt(0) == "0" && strDay.length > 1) strDay = strDay.substring(1)
    if (strMonth.charAt(0) == "0" && strMonth.length > 1) strMonth = strMonth.substring(1)
    for (var i = 1; i <= 3; i++) {
        if (strYr.charAt(0) == "0" && strYr.length > 1) strYr = strYr.substring(1)
    }
    month = parseInt(strMonth)
    day = parseInt(strDay)
    year = parseInt(strYr)
    if (pos1 == -1 || pos2 == -1) {
//        alert("The date format should be : dd/mm/yyyy")
        return false
    }
    if (strMonth.length < 1 || month < 1 || month > 12) {
//        alert("Please enter a valid month")
        return false
    }
    if (strDay.length < 1 || day < 1 || day > 31 || (month == 2 && day > daysInFebruary(year)) || day > daysInMonth[month]) {
//        alert("Please enter a valid day")
        return false
    }
    if (strYear.length != 4 || year == 0 || year < minYear || year > maxYear) {
//        alert("Please enter a valid 4 digit year between " + minYear + " and " + maxYear)
        return false
    }
    if (dtStr.indexOf(dtCh, pos2 + 1) != -1 || isInteger(stripCharsInBag(dtStr, dtCh)) == false) {
//        alert("Please enter a valid date")
        return false
    }
    return true
}

function ValidateDate(ddlDay, ddlMonth, ddlYear, label) {
    var dt = ddlDay.value + "/" + ddlMonth.value + "/" + ddlYear.value;
    if (isDate(dt) == false) {
        label.style.color = error_color;
        $("#RequiredFiels").css("display", "block");
        return false;
    }
    label.style.color = success_color;
    return true;
}