修复表单预览后关闭按钮被遮挡的bug

o2web/source/o2_core/o2/widget/Panel.js

@@ -276,7 +276,7 @@ o2.widget.Panel = new Class({
 		
 		this.returnMaxContainerSize = this.container.getSize();
 		
-		var size = $(document.body).getSize();
+		var size = this.container.getOffsetParent().getSize();
 		this.container.setStyles({
 			"position": "absolute",
 			"top": 2,
@@ -483,4 +483,4 @@ o2.widget.Panel = new Class({
 		}).inject(this.bottomNode);
 	}
 });
-o2.widget.Panel.panels = [];
\ No newline at end of file
+o2.widget.Panel.panels = [];