function confirmDelete(msg,deletePostingGuid)
{
 if (confirm(msg))
    {
        //call ajax --> send function channel's guid ex:'{B2856639-4E4B-4989-8A7C-A5BDCB8C36AB}'
       AJAX.asyncWithCallback('/GCA/Pages/DeletePosting.aspx', 'guid='+deletePostingGuid, "alertAndRefresh", true,true);       
    }
}

function alertAndRefresh(mes)
{
    alert(mes);
    location.reload(true);
}