i add a attr: data-id to an input text how to get the value?

i add a attr: data-id to an input text how to get the value?

Hi friends simple question i have this:

<input type='text' name='xtarima_izq_0' class='inputNoTarima2' id='xtarima_izq_0' size='10' value='' data-id='1222' autofocus>
    <button id="btnExecute">Test</button>


and i try get the value of data-id attr in this case: 1222

i try:

$(document).ready(function () {
   $('#btnExecute').on('click', function () {
      alert($("#xtarima_izq_0").dataset.id);       
   });
    

});


here the fiddle:



but not luck!!!

thanks