Question

I’m still learning jQuery and I ran into a problem. I have a table with 50+ rows. Each is labeled with an id.

<tr id="51">

This id is the database id and I need to pass it to jQuery and submit it along with an AJAX request.

        $($location).click(function () {
            var $currentSelection = $(this);

            // if there is already an input-field in this TD, return...
            if($currentSelection.find('select').length > 0)
                return;

            $currentSelection.html('');

            $('<select id="selectLocation" onChange="locationSubmit()"/>')
                .attr('name', 'location')
                .append('<option>Location 1</option>', '<option>Location 2</option>', '<option>Location 3</option>')
                .appendTo(this);
        });

locationSubmit()

function locationSubmit(){
            var $selectLocation = $('#selectLocation').val();
            var $selectId = $(this).val('tr#id'); //stuck here
            alert($selectId);
            $.ajax({ 
                url: '/ajax/training-update.php',
                data: {
                        action: $selectLocation,
                        courseid: $selectId
                    },
                type: 'POST',
                success: function(output) {
                    alert(output);
                    }
            });
        }

the alert in locationSubmit() is returning [object Object]. How do I pass the value of tr#id to locationSubmit() and send it via AJAX?

EDIT – HTML

<tr id="51">
    <td><a href="/link/goes/here.php?course_id=5&id=51">course name</a></td>
    <td>
        <span class="rowStartDate" id="rowStartDate151">09/10/12</span> - 
        <span class="rowEndDate" id="rowEndDate151">09/14/12</span>
    </td>
    <td class="location">Location 2</td>
    <td class="status">open</td>
</tr>

Answer 1

So, there is any good answer?

Test this:

$($location).click(function () {
        var $currentSelection = $(this);

        // if there is already an input-field in this TD, return...
        if($currentSelection.find('select').length > 0)
            return;

        $currentSelection.html('');

        $('<select id="selectLocation"/>')
            .attr('name', 'location')
            .append('<option>Location 1</option>', '<option>Location 2</option>', '<option>Location 3</option>')
            .appendTo(this);
    });

and replace your function with this:

$('body').delegate('#selectLocation', 'change', function(){

        var $selectLocation = $(this).val(); //Edited here also
        var $selectId = $(this).closest('tr').attr('id'); //edited here
        alert($selectId);
//The AJAX here        
});

And as you see, your function is gone and replaced by the delegate, which seemed to work great! The .delegate() is a very good function that is working all the time, even if elements are created after the DOM is ready. It’s listening all the time

Edited
Check the second code part.