standard ajax post with jQuery

gistfile1.js

// http://www.jqapi.com/#p=jQuery.ajax

var email = $("input#email").val();
var user = $("input#user").val();
var pass = $("input#pass").val();

var dataToSend = {
  email: email,
  username: user,
  password: pass
}

$.ajax({
  url: 'http://location.of.the/file/that/accepts/this/data.php',
  data: dataToSend, // what you want to send
  type: 'POST', // how you want to send it; POST is for sending data to the server, GET is for GETting. (there are others)
  success: function(dataRecievedFromServer) {
    // you've received a response from the server
    $("div#successMsg").html("Your account was created");
    // do something with dataReceivedFromServer, if necessary
  },
  error: function(error) {
    console.log(error);
    // or tell user the submission was unsuccessful
  }
});