Untitled

How to fix this animation using JQuery?
var readMoreInfoTop = 0;
var readMoreInfoLeft = 0;

readMoreInfoTop = readMoreOffset.top + 10;
readMoreInfoLeft = readMoreOffset.left + 10;

//doc ready...
function() {

  var leftPosition;

  $('.button').click(function() {
    //animate popup to open
    leftPosition = $(this).offset.left;
  });

  $('#close').click(function() {
    //animate popup to close using leftPosition
  });
}();