solution for ajax call on IE

$.ajax({
url:'',
data:'',
type:'get',
cache:false,
dataType:'json',
success:function(a)
{
 alert('success');
}
error:function(a)
{
 alert('error');
}

the above code when run on IE its always execute the error block on
success of ajax call for slove it use dataType:'jsonp' at the
place of dataType='json'