You can do something hacked - call modal, then in the callback onopen, remove()modal itself.
$("#something").dialog({
open: function(event, ui) { $('.ui-dialog').remove(); }
});
Hey! I said it was hacked :)
or
, . , , .
HTML- show() hide() .
<div class="ui-widget-overlay" style="width: 100%; height: 100%; z-index: 32767;"></div>
( , )
div () 100% height/width z-index opacity (, IE6 ),
position: fixed, , . , , $('body').css({ 'overflow-y': 'hidden' }).