Jquery Confirm and CodeIgniter Delete

Question

I'm working with this admin panel template confirm box.

http://themepixels.com/main/themes/demo/webpage/shamcey/elements.html

When i click confirm box's ok button ajax part wont work.

I dont understand why it isnt working?

Here my code:

//Jquery Part

<script>
jQuery(document).ready(function(){
if(jQuery('.confirmbutton').length > 0) {
    jQuery('.confirmbutton').click(function(){
        jConfirm('Can you confirm this?', 'Confirmation Dialog', function(r) {
             if(r==true){
                var article_id=$(this).attr("id");
                 $.ajax({
                    type:"POST",
                    url: "<?php echo site_url()?>admin/delete",data: "id="+article_id+"&categ=article",asynchronous: true,cashe: false,beforeSend: function(){},
                    success: function(){
                    $('#delete_link_'+article_id).hide();
                    }
                    }); 
             }
        });
    });
}
});
</script>

//HTML

<tr id="delete_link_15">
<td>15</td>
<td>1</td>
<td>asg</td>
<td>etc</td>
<td>etc</td>
<td>
<span class="btn-group">
<a class="btn btn-small confirmbutton"><i class="icon-trash"></i></a>
</span>
</td>
</tr>        

Answer 1

HTML Code

<tr id="delete_link_15">
<td>15</td>
<td>1</td>
<td>asg</td>
<td>etc</td>
<td>etc</td>
<td>
<span class="btn-group">
<a class="btn btn-small confirmbutton" onclick="deleteArticle('15')"><i class="icon-trash"></i></a>
</span>
</td>
</tr> 

Jquery code

<script>
jQuery(document).ready(function(){
function deleteArticle(article_id)
{
             var r=confirm("Can you confirm this?")
             if(r==true){

                 $.ajax({
                    type:"POST",
                    url: "<?php echo site_url()?>admin/delete",data: "id="+article_id+"&categ=article",asynchronous: true,cashe: false,beforeSend: function(){},
                    success: function(){
                    $('#delete_link_'+article_id).hide();
                    }
                    }); 
             }

}
</script>