var datePickerDivID = "datepicker";
var iFrameDivID = "datepickeriframe";

var dayArrayShort = new Array('Su', 'Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa');
        var dayArrayMed = new Array('Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat');
        var dayArrayLong = new Array('Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday');
        var monthArrayShort = new Array('Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec');
        var monthArrayMed = new Array('Jan', 'Feb', 'Mar', 'Apr', 'May', 'June', 'July', 'Aug', 'Sept', 'Oct', 'Nov', 'Dec');
        var monthArrayLong = new Array('January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December');
 

        var defaultDateSeparator = "-";        // common values would be "/" or "."
        var defaultDateFormat = "dmy"    // valid values are "mdy", "dmy", and "ymd"
        var dateSeparator = defaultDateSeparator;
        var dateFormat = defaultDateFormat;


        function displayDatePicker(dateFieldName, displayBelowThisObject, dtFormat, dtSep)
        {

        var targetDateField = document.getElementsByName (dateFieldName).item(0);
 
        // if we weren't told what node to display the datepicker beneath, just display it
        // beneath the date field we're updating
        if (!displayBelowThisObject)
        displayBelowThisObject = targetDateField;
 
        // if a date separator character was given, update the dateSeparator variable
        if (dtSep)
        dateSeparator = dtSep;
        else
        dateSeparator = defaultDateSeparator;
 
        // if a date format was given, update the dateFormat variable
        if (dtFormat)
        dateFormat = dtFormat;
        else
        dateFormat = defaultDateFormat;
 
        var x = displayBelowThisObject.offsetLeft;
        var y = displayBelowThisObject.offsetTop + displayBelowThisObject.offsetHeight ;
 
        // deal with elements inside tables and such
        var parent = displayBelowThisObject;
        while (parent.offsetParent) {
        parent = parent.offsetParent;
        x += parent.offsetLeft;
        y += parent.offsetTop ;
        }
          
        drawDatePicker(targetDateField, x, y);
        }


        /**
        Draw the datepicker object (which is just a table with calendar elements) at the
        specified x and y coordinates, using the targetDateField object as the input tag
        that will ultimately be populated with a date.

        This function will normally be called by the displayDatePicker function.
        */
        function drawDatePicker(targetDateField, x, y)
        {
        var dt = getFieldDate(targetDateField.value );
 
        // the datepicker table will be drawn inside of a <div> with an ID defined by the
        // global datePickerDivID variable. If such a div doesn't yet exist on the HTML
        // document we're working with, add one.
        if (!document.getElementById(datePickerDivID)) {
        // don't use innerHTML to update the body, because it can cause global variables
        // that are currently pointing to objects on the page to have bad references
        //document.body.innerHTML += "<div id='" + datePickerDivID + "' class='dpDiv'></div>";
        var newNode = document.createElement("div");
        newNode.setAttribute("id", datePickerDivID);
        newNode.setAttribute("class", "dpDiv");
        newNode.setAttribute("style", "visibility: hidden;");
        document.body.appendChild(newNode);
        }
 
        // move the datepicker div to the proper x,y coordinate and toggle the visiblity
        var pickerDiv = document.getElementById(datePickerDivID);
        pickerDiv.style.position = "absolute";
        pickerDiv.style.left = x + "px";
        pickerDiv.style.top = y + "px";
        pickerDiv.style.visibility = (pickerDiv.style.visibility == "visible" ? "hidden" : "visible");
        pickerDiv.style.display = (pickerDiv.style.display == "block" ? "none" : "block");
        pickerDiv.style.zIndex = 10000;
 
        // draw the datepicker table
        refreshDatePicker(targetDateField.name, dt.getFullYear(), dt.getMonth(), dt.getDate());
        }


        /**
        This is the function that actually draws the datepicker calendar.
        */
function refreshDatePicker(dateFieldName, year, month, day)
{
        // if no arguments are passed, use today's date; otherwise, month and year
        // are required (if a day is passed, it will be highlighted later)
        var thisDay = new Date();
 
        if ((month >= 0) && (year > 0)) {
        thisDay = new Date(year, month, 1);
        } else {
        day = thisDay.getDate();
        thisDay.setDate(1);
        }
 
        // the calendar will be drawn as a table
        // you can customize the table elements with a global CSS style sheet,
        // or by hardcoding style and formatting elements below
        var crlf = "\r\n";
        var TABLE = "<table cols=7 class='dpTable'>" + crlf;
        var xTABLE = "</table>" + crlf;
        var TR = "<tr class='dpTR'>";
        var TR_title = "<tr class='dpTitleTR'>";
        var TR_days = "<tr class='dpDayTR'>";
        var TR_todaybutton = "<tr class='dpTodayButtonTR'>";
        var xTR = "</tr>" + crlf;
        var TD = "<td class='dpTD' onMouseOut='this.className=\"dpTD\";' onMouseOver=' this.className=\"dpTDHover\";' ";    // leave this tag open, because we'll be adding an onClick event
        var TD_title = "<td colspan=3 class='dpTitleTD'>";
        var TD_buttons = "<td class='dpButtonTD'>";
        var TD_todaybutton = "<td colspan=7 class='dpTodayButtonTD'>";
        var TD_days = "<td class='dpDayTD'>";
        var TD_selected = "<td class='dpDayHighlightTD' onMouseOut='this.className=\"dpDayHighlightTD\";' onMouseOver='this.className=\"dpTDHover\";' ";    // leave this tag open, because we'll be adding an onClick event
        var xTD = "</td>" + crlf;
        var DIV_title = "<div class='dpTitleText'>";
        var DIV_selected = "<div class='dpDayHighlight'>";
        var xDIV = "</div>";
 
        // start generating the code for the calendar table
        var html = TABLE;
 
        // this is the title bar, which displays the month and the buttons to
        // go back to a previous month or year or forward to the next month or year
        html += TR_title;
        html += TD_buttons + getYearButtonCode(dateFieldName, thisDay, -1, "&lt;&lt;", "Prev Year") + xTD;
        html += TD_buttons + getButtonCode(dateFieldName, thisDay, -1, "&lt;", "Prev Month") + xTD;
        html += TD_title + DIV_title + monthArrayShort[ thisDay.getMonth()] + "," + thisDay.getFullYear() + xDIV + xTD;
        html += TD_buttons + getButtonCode(dateFieldName, thisDay, 1, "&gt;", "Next Month") + xTD;
        html += TD_buttons + getYearButtonCode(dateFieldName, thisDay, 1, "&gt;&gt;", "Next Year") + xTD;
        html += xTR;
 
        // this is the row that indicates which day of the week we're on
        html += TR_days;
        for(i = 0; i < dayArrayShort.length; i++)
        html += TD_days + dayArrayShort[i] + xTD;
        html += xTR;
 
        // now we'll start populating the table with days of the month
        html += TR;
 
        // first, the leading blanks
        for (i = 0; i < thisDay.getDay(); i++)
        html += TD + "&nbsp;" + xTD;
 
        // now, the days of the month
        do {
        dayNum = thisDay.getDate();
        TD_onclick = " onclick=\"updateDateField('" + dateFieldName + "', '" + getDateString(thisDay) + "');\">";
		    
        if (dayNum == day)
        html += TD_selected + TD_onclick + DIV_selected + dayNum + xDIV + xTD;
        else
        html += TD + TD_onclick + dayNum + xTD;
    
        // if this is a Saturday, start a new row
        if (thisDay.getDay() == 6)
        html += xTR + TR;
    
        // increment the day
        thisDay.setDate(thisDay.getDate() + 1);
        } while (thisDay.getDate() > 1)
 
        // fill in any trailing blanks
        if (thisDay.getDay() > 0) {
        for (i = 6; i > thisDay.getDay(); i--)
        html += TD + "&nbsp;" + xTD;
        }
        html += xTR;
 
        // add a button to allow the user to easily return to today, or close the calendar
        var today = new Date();
        var todayString = "Today is " + dayArrayMed[today.getDay()] + ", " + monthArrayMed[ today.getMonth()] + " " + today.getDate();
        html += TR_todaybutton + TD_todaybutton;
        html += "<button class='dpTodayButton' style='width:91' onClick='refreshDatePicker(\"" + dateFieldName + "\");'>This month</button> ";
        html += "<button class='dpTodayButton' style='width:71' onClick='updateDateField(\"" + dateFieldName + "\");'>Close</button>";
		
		/**************************************/

		html+="<br>";
		html += "<button class='dpTodayButton' style='width:91'  onClick='tillDatepicker(\"" + dateFieldName + "\");'>Till date</button>";
		html += "<button class='dpTodayButton' style='width:71' onClick='clearDatepicker(\"" + dateFieldName + "\");'>Clear</button>";

        /*****************************************/

        html += xTD + xTR;
 
        // and finally, close the table
        html += xTABLE;
 
        document.getElementById(datePickerDivID).innerHTML = html;
        // add an "iFrame shim" to allow the datepicker to display above selection lists
        adjustiFrame();
        
 }


        /**
        Convenience function for writing the code for the buttons that bring us back or forward
        a month.
        */
        function getButtonCode(dateFieldName, dateVal, adjust, label, tooltip)
        {
        var newMonth = (dateVal.getMonth () + adjust) % 12;
        var newYear = dateVal.getFullYear() + parseInt((dateVal.getMonth() + adjust) / 12);
        if (newMonth < 0) {
        newMonth += 12;
        newYear += -1;
        }
 
        return "<button class='dpButton' onClick='refreshDatePicker(\"" + dateFieldName + "\", " + newYear + ", " + newMonth + ");', title = '"+tooltip+"'>" + label + "</button>";
        }







////////////////// Changes by Jeetendra Garg ///////////////////////
/**
Convenience function for writing the code for the buttons that bring us back or forward
a year.
*/
function getYearButtonCode(dateFieldName, dateVal, adjust, label, tooltip)
{
var newMonth = dateVal.getMonth();
var newYear = dateVal.getFullYear() ;
newYear += adjust;

return "<button class='dpButton' onClick='refreshDatePicker(\"" + dateFieldName + "\", " + newYear + ", " + newMonth + ");' title = '"+tooltip+"'>" + label + "</button>";
}


////////////////// Changes end ///////////////////////










/************************************/

        function clearDatepicker(dateFieldName,dateVal)
        {
            var targetDateField = document.getElementsByName(dateFieldName).item(0);

            if (dateVal)
            {
                targetDateField.value = dateVal;
            }
            else
            {
                targetDateField.value = "";
            }

            var pickerDiv = document.getElementById(datePickerDivID);

            pickerDiv.style.visibility = "hidden";
            pickerDiv.style.display = "none";

            adjustiFrame();
            targetDateField.focus();


            if ((dateVal) && (typeof(datePickerClosed) == "function"))
            datePickerClosed(targetDateField);
        }




		function tillDatepicker(dateFieldName,dateVal)
		{
		dateVal="Till date";
		return updateDateField(dateFieldName,dateVal)
		}

		/*******************************************/

        /**
        Convert a JavaScript Date object to a string, based on the dateFormat and dateSeparator
        variables at the beginning of this script library.
        */
        function getDateString(dateVal)
        {
        var dayString = "00" + dateVal.getDate();
        var monthString = "00" + (dateVal.getMonth()+1);
        dayString = dayString.substring(dayString.length - 2);
        monthString = monthString.substring(monthString.length - 2);
 
        switch (dateFormat) {
        case "dmy" :
        return dayString + dateSeparator + monthString + dateSeparator + dateVal.getFullYear();
        case "ymd" :
        return dateVal.getFullYear() + dateSeparator + monthString + dateSeparator + dayString;
        case "mdy" :
        default :
        return monthString + dateSeparator + dayString + dateSeparator + dateVal.getFullYear();
        }
        }


        /**
        Convert a string to a JavaScript Date object.
        */
        function getFieldDate(dateString)
        {
        var dateVal;
        var dArray;
        var d, m, y;
 
        try {
        dArray = splitDateString(dateString);
        if (dArray) {
        switch (dateFormat) {
        case "dmy" :
        d = parseInt(dArray[0], 10);
        m = parseInt(dArray[1], 10) - 1;
        y = parseInt(dArray[2], 10);
        break;
        case "ymd" :
        d = parseInt(dArray[2], 10);
        m = parseInt(dArray[1], 10) - 1;
        y = parseInt(dArray[0], 10);
        break;
        case "mdy" :
        default :
        d = parseInt(dArray[1], 10);
        m = parseInt(dArray[0], 10) - 1;
        y = parseInt(dArray[2], 10);
        break;
        }
        dateVal = new Date(y, m, d);
        } else if (dateString) {
        dateVal = new Date(dateString);
        } else {
        dateVal = new Date();
        }
        } catch(e) {
        dateVal = new Date();
        }
 
        return dateVal;
        }


        /**
        Try to split a date string into an array of elements, using common date separators.
        If the date is split, an array is returned; otherwise, we just return false.
        */
        function splitDateString(dateString)
        {
        var dArray;
        if (dateString.indexOf("/") >= 0)
        dArray = dateString.split("/");
        else if (dateString.indexOf(".") >= 0)
        dArray = dateString.split(".");
        else if (dateString.indexOf("-") >= 0)
        dArray = dateString.split("-");
        else if (dateString.indexOf("\\") >= 0)
        dArray = dateString.split("\\");
        else
        dArray = false;
 
        return dArray;
        }


        function updateDateField(dateFieldName, dateString)
        {

            var targetDateField = document.getElementsByName(dateFieldName).item(0);

            if (dateString)
            targetDateField.value = dateString;

            var pickerDiv = document.getElementById(datePickerDivID);

            pickerDiv.style.visibility = "hidden";
            pickerDiv.style.display = "none";

            adjustiFrame();
            targetDateField.focus();

            if ((dateString) && (typeof(datePickerClosed) == "function"))
            datePickerClosed(targetDateField);
        }



        function adjustiFrame(pickerDiv, iFrameDiv)
        { 
        var is_opera = (navigator.userAgent.toLowerCase().indexOf("opera") != -1);
        if (is_opera)
        return;
  
        // put a try/catch block around the whole thing, just in case
        try {
        if (!document.getElementById(iFrameDivID)) {
    
        var newNode = document.createElement("iFrame");
        newNode.setAttribute("id", iFrameDivID);
        newNode.setAttribute("src", "javascript:false;");
        newNode.setAttribute("scrolling", "no");
        newNode.setAttribute ("frameborder", "0");
        document.body.appendChild(newNode);
        }
    
        if (!pickerDiv)
        pickerDiv = document.getElementById(datePickerDivID);
        if (!iFrameDiv)
        iFrameDiv = document.getElementById(iFrameDivID);
    
        try {
        iFrameDiv.style.position = "absolute";
        iFrameDiv.style.width = pickerDiv.offsetWidth;
        iFrameDiv.style.height = pickerDiv.offsetHeight ;
        iFrameDiv.style.top = pickerDiv.style.top;
        iFrameDiv.style.left = pickerDiv.style.left;
        iFrameDiv.style.zIndex = pickerDiv.style.zIndex - 1;
        iFrameDiv.style.visibility = pickerDiv.style.visibility ;
        iFrameDiv.style.display = pickerDiv.style.display;
        } catch(e) {
        }
 
        } catch (ee) {
        }
 
        }