jquery - Form Validation with ajax request -

i have general validation method validatefields application. script check every field needs validated against several conditions , increment counter.

if(validate_for_nil(field) == true){   // return true , continue other validations } else {    //stop further actions , raise error } if(validate_max_chars(field) == true){   //continue other validations }else{   //stop , raise error } 

similarly uniqueness validation, need send ajax request. problem is, function not waiting ajax response.it check condition undefined ajax response.how can make entire function wait till ajax response comes? async:false in ajax request not convenient me. please here code:

function form_validation() {    $("[data-required=true]:visible").each(function(){       element = $(this);        errors = validate_fields(element);       total_errors = total_errors + errors;   })    if(total_errors == 0) {      //submit form   }else{     //do nothing   } }  function validate_fields(field) {    error = 0    if(validate_for_nil(field) == true){       // return true , continue other validations    } else {      error = error+1      raise_error()    }    if(validate_max_chars(field) == true){       //continue other validations    }else{       //counter increment , raise error    }    if(validate_uniqueness(field) == true) { // method calls ajax request      // return true    }else {       // counter increment , raise error     } } 

use ajax success/error function(s):

$.ajax({ cache: false,     url: "some url",     data: {  },     success: function (data) {        //do stuff here     },     error: function (ajaxcontext) {         alert(ajaxcontext.responsetext)     } });