Question

I have a field which produces a drop down that a user can select from as such

            $(function() {
              $('.serial_number').live('focus.autocomplete', function() { 
                $(this).autocomplete("/admin/includes/getinvoiceajax.php", {
                    width: 300,
                    matchContains: true,
                    mustMatch: true,
                    selectFirst: false
                }); 
              });
            });

<input type="text" name="serial_number[]" id="serial_number" class="serial_number" />
<input type="text" name="serial_number[]" id="serial_number" class="serial_number" />
<input type="text" name="serial_number[]" id="serial_number" class="serial_number" />
<input type="text" name="serial_number[]" id="serial_number" class="serial_number" />

I have set the mustMatch: true, so a user can only select what is from the dropdown list. Is there a way to not allow a duplicate selection from any of the other fields. Since I have a few of these fields it could possible allow the user to select the same value for multiple fields. I need to make sure they are unique.

Answer 1

My origianl question was not allowing a value that did not exist from the dropdown which was I figured it our as soon as I asked the question. I had to change

mustMatch: false,

to

mustMatch: true,

I editied my original question to ask another relating to the same subject.