dialog break css menu

dialog break css menu


Hi,
I have a classic css menu. Working easily on Firefox and co, and
working with a behavior: url(tpl_fr/csshover.htc); on Internet
explorer 6.
when I use a jquery UI dialog and close it, all these menu does not
work (until I reload the whole page). Any ideas ?
Here is the code of the dialog :
$(function() {
    $("#dialog_num_igle").dialog({
        bgiframe: true,
        position:'center',
        modal: true,
        resizable:false,
        closeOnEscape:true,
        draggable:false,
        width:430,
        autoOpen:false,
        buttons: {
            "Annuler": function() {
                $(this).dialog('close');
            }
        }
    });
});