ie7 Expected identifier, string or number with AJAX function

Question

I ma using AJAX to update a database and it works well on all browsers except IE7. Before I give up and decide that users IE7 should be asked to upgrade I thought I'd check and make sure I'm not missing something obvious seeing as I'm very new to AJAX.

Script debugging throws an error saying 'SCRIPT1028: Expected identifier, string or number' identifying the offending character as the second to last curly brace

<script>
  function save_pos_reasons()
  {
    $.ajax({
    type: "POST",
    url: "save_pos_reasons.php",
    data: $('#add_positioning').serialize(),
    });
 }
</script>

And when I try to run the function it says

SCRIPT5007: The value of the property 'save_pos_reasons' is null or undefined, not a function object.

and identifies the line below as the cause.

<input type="button" class="submit" value="Save" onClick="save_pos_reasons()"/>

I am beginning to wonder if it is the JQuery serialize function that it is struggling with

Answer 1

You have to get rid of the trailing comma.

data: $('#add_positioning').serialize(), //this comma is the culprit