php - undefined is not a function javascript but works with alert box -


i keep getting error. found giving alert box first line of function got rid of problem. :(. function loop through select list onkeypress search textbox , compare options in select list. if doesn't match temporarily remove or disable them. apologize may have not phrased question right @ first. code:

function search() {      var searchtext = document.getelementbyid("usersearch").value;     var userslist = document.getelementbyid("users");     userslist.disabled(true);     for(var = 1; i<userslist.length; i++)     {         alert("test");     } }

html code:

the problem persists , have looked on internet problem think can caused several reasons. using opera testing.

this code creates select list.

<script type="text/javascript">  var request = $.ajax({                         url: "sendmsgprep.php",                         type: "post",                                     datatype: "html"                      });                      request.done(function(msg) {                         $(".users").html(msg);                               });                      request.fail(function(jqxhr, textstatus) {                         //alert( "request failed online 367: " + textstatus );                     }); </script>

other file 'sendmsgprep.php"

<?php $id = $_cookie['id']; $username = $_cookie['username'];  require("connect.html");   echo '<select name="users" id="users" tabindex="4" onfocus="wipe(this)"> <option value="">--select--</option>';  $query = "select * users user_id!='$id'";  $result = mysql_query($query, $connect)or die("error on line 31<br>".mysql_error());  while ($row = mysql_fetch_array($result)) { echo "<option value=".$row['user_id'].">".$row['username']."</option>"; }  echo '</select>'; ?>


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