jquery ajax request success portion not working

jquery ajax request success portion not working

I am having this ajax request but success portion is not working I have
been working from past one hour but not able to get is there any thing I
am missing.
$.ajax({
url: "ajaxsearch",
type: 'POST',
dataType: "jsonp",
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
},
data: JSON.stringify(eval({
name_startsWith: request.term
})),
success: function (data) {
alert("yoo"); //What ever I write do not get executed is any
thing wrong
}
});