jquery - Duplicate input in form -

i have dynamically generated form multiple text input fields:

<input class="w200" type="text" value="" name="field[7018]"> <input class="w200" type="text" value="" name="field[7019]"> <input class="w200" type="text" value="" name="field[7020]"> ... <input class="w200" type="text" value="" name="field[7055]"> 

using jquery, how can detect duplicate values on input?

there's post on so proposes following solution:

$("#check").click(function() {     $.post("checkname.php",             { name : $("#textboxname").val() },            function(data) {              //data contain output file `checkname.php`              if(data=="ok") { //imagine case output ok if not duplicate found                 alert('ok');              else {                  alert('duplicate name exists');              }     ); }); 

it works if use enters 1 value @ time. if user gets opens form prepopulated values, edit them. how check duplicates then?

if asking how check duplicate values of existing input-elements on page, :

$("input[type='text']").change( function() {     // check input ($(this).val()) validity here     var valueofchangedinput = $(this).val();     var timerepeated = 0;     $("input[type='text']").each(function () {         //inside each() check 'valueofchangedinput' other existing input         if ($(this).val() == valueofchangedinput ) {             timerepeated++; //this executed @ least 1 time because of input, changed         }     });      if(timerepeated > 1) {         alert("duplicate value found !");     }     else {         alert("no duplicates !");     } });