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diff --git a/indra/llui/llmodaldialog.h b/indra/llui/llmodaldialog.h
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+++ b/indra/llui/llmodaldialog.h
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+/** 
+ * @file llmodaldialog.h
+ * @brief LLModalDialog base class
+ *
+ * Copyright (c) 2002-$CurrentYear$, Linden Research, Inc.
+ * $License$
+ */
+
+#ifndef LL_LLMODALDIALOG_H
+#define LL_LLMODALDIALOG_H
+
+#include "llfloater.h"
+#include "llframetimer.h"
+
+class LLModalDialog;
+
+// By default, a ModalDialog is modal, i.e. no other window can have focus
+// However, for the sake of code reuse and simplicity, if mModal == false,
+// the dialog behaves like a normal floater
+
+class LLModalDialog : public LLFloater
+{
+public:
+	LLModalDialog( const LLString& title, S32 width, S32 height, BOOL modal = true );
+	/*virtual*/ ~LLModalDialog();
+
+	/*virtual*/ void 	reshape(S32 width, S32 height, BOOL called_from_parent = 1);
+	
+	/*virtual*/ void	startModal();
+	/*virtual*/ void	stopModal();
+
+	/*virtual*/ BOOL	handleMouseDown(S32 x, S32 y, MASK mask);
+	/*virtual*/ BOOL	handleMouseUp(S32 x, S32 y, MASK mask);
+	/*virtual*/ BOOL	handleHover(S32 x, S32 y, MASK mask);
+	/*virtual*/ BOOL	handleScrollWheel(S32 x, S32 y, S32 clicks);
+	/*virtual*/ BOOL	handleDoubleClick(S32 x, S32 y, MASK mask);
+	/*virtual*/ BOOL	handleRightMouseDown(S32 x, S32 y, MASK mask);
+	/*virtual*/ BOOL	handleKeyHere(KEY key, MASK mask, BOOL called_from_parent );
+
+	/*virtual*/ void	onClose(bool app_quitting);
+
+	/*virtual*/ void	setVisible(BOOL visible);
+	/*virtual*/ void	draw();
+
+	static void		onAppFocusLost();
+	static void		onAppFocusGained();
+
+	static S32		activeCount() { return sModalStack.size(); }
+	
+protected:
+	void			centerOnScreen();
+
+protected:
+	LLFrameTimer 	mVisibleTime;
+	BOOL			mModal; // do not change this after creation!
+
+	static std::list<LLModalDialog*> sModalStack;  // Top of stack is currently being displayed
+};
+
+#endif  // LL_LLMODALDIALOG_H