javascript - how to send post data in jquery using ajax -


i have simple form , want input field losses focus event fired check content if , replies accordingly that

$("document").ready(function()     $("#txt_email").blur(function() {                            var email=$("#txt_email").val();                            $.post('ajax/tester.php', {chk:email}, function(data) {             alert(data) ;         });     }); });

so have done till it's showing nothing: no error, no output. using jquery 1.9.1 , want know how check value of post data on ajax/tester.php page

right doing 

$tochk=isset($_post['chk'])?$_post['chk']:null;  echo $tochk;

i hope helps:

$(function(){     $("#txt_email").blur(function() {                            var email=$("#txt_email").val();          alert('email: ' + email);         var jqxhr = $.post('ajax/tester.php', {chk:email});         jqxhr.done(function(data) { alert(data); });         jqxhr.fail(function() { alert("error"); });     }); });  window.onerror = function(errormessage, url, line) {     var errortext = 'message: ' + errormessage + '\nurl: ' + url + '\nline: ' + line;     alert(errortext); }

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