ajax

$.ajax({
url: "index.php/Welcome/add_data",
type: "post",
data: {name : sendName ,
	   email : sendEmail,
	   num : sendNum,
	   largo : sendlargo
		},
success : function(data){
//data=$dano;
//alert(data);  /* alerts the response from php.*/
//location.href ="index.php/Welcome/redirecciona";

//window.location.replace("index.php/Welcome/redirecciona");

// funciona como si dieras clic en un enlace
//+ encodeURIComponent(x)+ encodeURIComponent(y)+encodeURIComponent(z)
window.location.href = "index.php/Welcome/redirecciona"+'/'+encodeURIComponent(x)+'/'+encodeURIComponent(y)+'/'+en