[jQuery] how tu use jQuery.getJSON in synchronous mode

[Olivier]

I try to use jQuery.ajax with dataType : 'json' :

jQuery.ajax({
    url : "poll.json",
   dataType : 'json',
   cache : false,
  succcess : function(jsonObj, textStatus){
   ........
 },
 error : function(XMLHttpRequest, textStatus, errorThrown){
.........
 },
async : false
});

it seems not running