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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