jquery1.9.2and IE9

jquery1.9.2and IE9

  1.   <script>
  2.   // increase the default animation speed to exaggerate the effect
  3.   $.fx.speeds._default = 1000;
  4.   $(function() {
  5.   $( "#dialog" ).dialog({
  6.   autoOpen: false,
  7.   show: "blind",
  8.   hide: "explode",
  9.   modal: true,
  10.   resizable: false,
  11.   title: "Dialog Title",
  12.   position: {
  13.   my: "center top-400",
  14.   at: "center",
  15.   of: window
  16.   }
  17.   });
  18.   $( "#opener" ).click(function() {
  19.   $( "#dialog" ).dialog( "open" );
  20.   return false;]
  21.   });
  22.   });
  23.   </script>
 
does position not work in IE9?