Jquery dialog 拖动 按钮失效

self.uiDialog.draggable({cancel: '.ui-dialog-content, .ui-dialog-titlebar-close',handle: '.ui-dialog-titlebar',containment: 'document',start: function(event, ui) {if(window.navigator.userAgent.indexOf("MSIE")<1)  //2012-4-23 mod{heightBeforeDrag = options.height === "auto" ? "auto" : $(this).height();$(this).height($(this).height()).addClass("ui-dialog-dragging");}self._trigger('dragStart', event, filteredUi(ui));},drag: function(event, ui) {self._trigger('drag', event, filteredUi(ui));},stop: function(event, ui) {options.position = [ui.position.left - doc.scrollLeft(),ui.position.top - doc.scrollTop()];if(window.navigator.userAgent.indexOf("MSIE")<1)  //2012-4-23 mod{$(this).removeClass("ui-dialog-dragging").height(heightBeforeDrag);}self._trigger('dragStop', event, filteredUi(ui));$.ui.dialog.overlay.resize();}});

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