i don't know why the url will change like /a/b?_=1830 , and return 500 (Internal Server Error)
$.ajax({
url:'/a/b',
type: 'GET',
cache: false,
async: false,
dataType: 'JSON',
success: function (respone)
{
alert(respone);
},
error:function(jqXHR,textStatus,errorThrown)
{
alert(textStatus);
}
});