Parse data with javascript

Hi guys I'm a newbie of JavaScript and I tried a lot before posting here.

I have two input tags where i'm using Datapicker from jquery UI to pick some data range. After I select these values with jQuery method .val(), but the problem is that Datepicker use this type of data form: 12/30/2013, but I need to parse this data in this way: 2013-10-21T00:00:00 because I must use this date range to call a getJSON method to call a webserver. I wrote also this function to parse manually. Bellow is my code, what's wrong? In general I want to find a way to translate the data from input tags in this format: yyyy-MM-dd'T'HH:mm:ss because our web server accept through rest this format.

<input id="from" type="text" class="datepicker" />
<input id="to" type="text" class="datepicker" />
<input id="submit" value="Send" type="submit" />
$(function () {

    $("#submit").click(function () {

        var from = $('#from').val();
        var to = $('#to').val();

        function parse(i) {
            var t = i.toString().split("/");
            var y = t[2];
            var m = t[0];
            var d = t[1];
            var n_d = y.concat("-") + m.concat("-") + d.concat("T00:00:00");
            return n_d;

    $.getJSON("xxxx/?from=" + parse(from) + "&to=" +parse(to));




Try Date.parse and Date.prototype.toISOString:

var date = Date.parse('12/30/2013');//1388347200000
date = new Date(date);//"Mon Dec 30 2013 00:00:00 GMT+0400 (MSK)"

You can get the actual date objects by using $(element).datepicker('getDate'), and then just parse those to the wanted format and send away :

Number.prototype.padLeft = function(base,chr){
    var  len = (String(base || 10).length - String(this).length)+1;
    return len > 0? new Array(len).join(chr || '0')+this : this;

function parseDate(d) {
    return [d.getDate().padLeft(), (d.getMonth()+1).padLeft(), d.getFullYear()].join('/')+'T'+
           [d.getHours().padLeft(), d.getMinutes().padLeft(), d.getSeconds().padLeft()].join(':');

$(function () {

    $("#submit").click(function () {
        var from = $('#from').datepicker('getDate');
        var to   = $('#to').datepicker('getDate');

        $.getJSON("xxxx/?from=" + parseDate(from) + "&to=" + parseDate(to));


I'm guessing you would have to url encode those dates as well, and it probably would be better to just do

$.getJSON("xxxx/", {from : parseDate(from), to : parseDate(to)});

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