Untitled

How to loop through LI items in UL, get specific attributes, and pass them via $.ajax data
<ul id="gallery">
    <li id="attachment-32" class="featured"><a href="..." title=""><img src="..." alt="" /></a></li>
    <li id="attachment-34"><a href="..." title=""><img src="..." alt="" /></a></li>
    <li id="attachment-38"><a href="..." title=""><img src="..." alt="" /></a></li>
    <li id="attachment-64"><a href="..." title=""><img src="..." alt="" /></a></li>
    <li id="attachment-75"><a href="..." title=""><img src="..." alt="" /></a></li>
    <li></li>
</ul>

$.ajax({
    url: '/ajax/upload.php',
        type: 'POST',
    data: { ... },
        success: function(data){
        }
});

var ids = $("#gallery li").map(function () {
    return this.id.split("-")[1];
}).get().join(",");

$.ajax({
    url: '/ajax/upload.php',
    type: 'POST',
    data: { ids: ids },
    success: function(data) {

    }
});

var val = new Array();
$('#gallery li').each(function(){
    val.push($(this).attr('id'));
});
document.write(val);

$.ajax({
    url: '/ajax/upload.php',
        type: 'POST',
    data: { attached : val },
        success: function(data){
        }
});