[melky]

function deletemessage(id, link)
    {
        jQuery.noConflict();
        document.getElementById('wall').src = link;
        //alert(id);
        jQuery.ajax({url: "/main_include/message_wall/delete_message_wall.php",
            dataType: "html",
*!*
            beforeSend : function(){  history.replaceState({}, document.title, location.href+"?del="+id ) },
*/!*
            type: "POST",
            data: { c: id},
            success: function(msg) {
                //alert("хуяк");
                document.getElementById('wall').innerHTML = msg;
            },
            error: function(XMLHttpRequest, textStatus, errorThrown) {
                alert('Ошибка');
            }
        });
    };

есс-но это в IE работать не будет.