js +ci

/*JS*/
var dano='dano';
alert(dano);
$.post(baseurl+"index.php/Welcome/getdata",
{
	sitReg: dano
},
function (data) {
	// body...
	//alert(data);
	var obj= JSON.parse(data);
	$.each(obj,function(i,item){ //recorre
		$('#tabledano').append(
		'<tr>'+
			'<td>'+item.id  +'</td>'+
			'<td>'+item.Num  +'</td>'+
			'<td>'+item.email  +'</td>'+
			'<td>'+item.num  +'</td>'+
		'</tr>'

		);

	});
});

/*footer*/

<footer>
	<?php  if($this->uri->segment(1)==''){?>
<script src="<?php echo base_url() ?>js/dano.js"></script>
	<?php } ?>
/*footer*/

/*controlador*/

public function getdata(){
		$d=$this->input->post('sitReg');
		$resultado=$this->Mload->getdata($d);
		echo json_encode($resultado);


	}