<input type="text" name="pole1" id="pole1" />

var element1 = document.createElement('input');
element1.setAttribute('type', 'text');
element1.setAttribute('name', "pole2");
element1.setAttribute('id', "pole2");
document.getElementById("my_div").appendChild(element1);

$(function() {
    $('#pole1').datepick({
                    dateFormat: 'yy-mm-dd'
                    });    
    $('#pole2').datepick({
                    dateFormat: 'yy-mm-dd'
                    });                                
});