AJAX plus attr()

AJAX plus attr()

I want to go to a page with ajax in the background and return a value of a field. I keeps on returning nothing.
this is what I have so far.

$.get("file.php", function(data){
var response = $(data).find('[name*=user]').attr("value");
  alert(response);
});



update:
$.ajax({
  type: "POST",
   url: "file.php",
   async: false,
   beforeSend: function(msg){
   var i = $(msg).find('[name*=user]').attr('value');
    console.log(i);
},
   success: function(msg){
   alert("sucess");
   }
});


How would i do it?