<form>
            <label>Day: </label>
            <select name="day" id="day">
                <option value="0">1</option>
                <option value="1">2</option>
                <option value="2">3</option>
                <option value="3">4</option>
                <option value="4">5</option>
                <option value="5">6</option>
                <option value="6">7</option>
                <option value="7">8</option>
                <option value="8">9</option>
                <option value="9">10</option>
                <option value="10">11</option>
                <option value="11">12</option>
                <option value="12">13</option>
                <option value="13">14</option>
                <option value="14">15</option>
                <option value="15">16</option>
                <option value="16">17</option>
                <option value="17">18</option>
                <option value="18">19</option>
                <option value="19">20</option>
                <option value="20">21</option>
                <option value="21">22</option>
                <option value="22">23</option>
                <option value="23">24</option>
                <option value="24">25</option>
                <option value="25">26</option>
                <option value="26">27</option>
                <option value="27">28</option>
                <option value="28">29</option>
                <option value="29">30</option>
                <option value="30">31</option>
            </select>
            <label>Month: </label>
            <select name="month" id="month">
                <option value="0">January</option>
                <option value="1">February</option>
                <option value="2">March</option>
                <option value="3">May</option>
                <option value="4">April</option>
                <option value="5">June</option>
                <option value="6">July</option>
                <option value="7">August</option>
                <option value="8">September</option>
                <option value="9">October</option>
                <option value="10">November</option>
                <option value="11">Dicember</option>
            </select>
            <label>Year: </label>
            <select name="year" id="year">
                <option value="2000">2000</option>
                <option value="2001">2001</option>
                <option value="2002">2002</option>
                <option value="2003">2003</option>
                <option value="2004">2004</option>
                <option value="2005">2005</option>
                <option value="2006">2006</option>
                <option value="2007">2007</option>
                <option value="2008">2008</option>
                <option value="2009">2009</option>
                <option value="2010">2010</option>
                <option value="2011">2011</option>
            </select>
            <input type="button" onclick="toDate();" value="Validar">
        </form>