diff --git a/lime/_backend/html5/HTML5Application.hx b/lime/_backend/html5/HTML5Application.hx
index c0d5be5cc..f5e926031 100644
--- a/lime/_backend/html5/HTML5Application.hx
+++ b/lime/_backend/html5/HTML5Application.hx
@@ -160,11 +160,7 @@ class HTML5Application {
 			}
 			
 			var keyCode = cast convertKeyCode (event.keyCode != null ? event.keyCode : event.which);
-			var modifier =
-				(event.shiftKey ? (KeyModifier.LSHIFT | KeyModifier.RSHIFT) : 0) | //Press L&R key at the same time
-				(event.ctrlKey ? (KeyModifier.LCTRL | KeyModifier.RCTRL) : 0) |
-				(event.altKey ? (KeyModifier.LALT | KeyModifier.RALT) : 0) |
-				(event.metaKey ? (KeyModifier.LMETA | KeyModifier.RMETA) : 0);
+			var modifier = (event.shiftKey ? (KeyModifier.SHIFT) : 0) | (event.ctrlKey ? (KeyModifier.CTRL) : 0) | (event.altKey ? (KeyModifier.ALT) : 0) | (event.metaKey ? (KeyModifier.META) : 0);
 			
 			if (event.type == "keydown") {
 				
diff --git a/lime/ui/KeyModifier.hx b/lime/ui/KeyModifier.hx
index bc3d20216..e22be0cad 100644
--- a/lime/ui/KeyModifier.hx
+++ b/lime/ui/KeyModifier.hx
@@ -1,23 +1,123 @@
 package lime.ui;
 
 
-class KeyModifier {
-	//SDLMod
-	public static inline var NONE  = 0x0000;
-	public static inline var LSHIFT= 0x0001;
-	public static inline var RSHIFT= 0x0002;
-	public static inline var LCTRL = 0x0040;
-	public static inline var RCTRL = 0x0080;
-	public static inline var LALT  = 0x0100;
-	public static inline var RALT  = 0x0200;
-	public static inline var LMETA = 0x0400;
-	public static inline var RMETA = 0x0800;
-	public static inline var NUM   = 0x1000;
-	public static inline var CAPS  = 0x2000;
-	public static inline var MODE  = 0x4000;
-
-	public static inline var CTRL  = (LCTRL|RCTRL);
-	public static inline var SHIFT = (LSHIFT|RSHIFT);
-	public static inline var ALT   = (LALT|RALT);
-	public static inline var META  = (LMETA|RMETA);
-}
+abstract KeyModifier(Int) from Int to Int {
+	
+	
+	public static inline var NONE:KeyModifier = 0x0000;
+	public static inline var LEFT_SHIFT:KeyModifier = 0x0001;
+	public static inline var RIGHT_SHIFT:KeyModifier = 0x0002;
+	public static inline var LEFT_CTRL:KeyModifier = 0x0040;
+	public static inline var RIGHT_CTRL:KeyModifier = 0x0080;
+	public static inline var LEFT_ALT:KeyModifier = 0x0100;
+	public static inline var RIGHT_ALT:KeyModifier = 0x0200;
+	public static inline var LEFT_META:KeyModifier = 0x0400;
+	public static inline var RIGHT_META:KeyModifier = 0x0800;
+	public static inline var NUM_LOCK:KeyModifier = 0x1000;
+	public static inline var CAPS_LOCK:KeyModifier = 0x2000;
+	public static inline var MODE:KeyModifier = 0x4000;
+	
+	public static inline var CTRL:KeyModifier = (0x0040 | 0x0080);
+	public static inline var SHIFT:KeyModifier = (0x001 | 0x0002);
+	public static inline var ALT:KeyModifier = (0x0100 | 0x0200);
+	public static inline var META:KeyModifier = (0x0400 | 0x0800);
+	
+	public var altKey (get, set):Bool;
+	public var capsLock (get, set):Bool;
+	public var ctrlKey (get, set):Bool;
+	public var metaKey (get, set):Bool;
+	public var numLock (get, set):Bool;
+	public var shiftKey (get, set):Bool;
+	
+	
+	private function get_altKey ():Bool {
+		
+		return (this & LEFT_ALT > 0) || (this & RIGHT_ALT > 0);
+		
+	}
+	
+	
+	private inline function set_altKey (value:Bool):Bool {
+		
+		this = value ? (this | ALT) : (this & 0xFFFFFFF - (1 << ALT));
+		return value;
+		
+	}
+	
+	
+	private function get_capsLock ():Bool {
+		
+		return (this & CAPS_LOCK > 0) || (this & CAPS_LOCK > 0);
+		
+	}
+	
+	
+	private inline function set_capsLock (value:Bool):Bool {
+		
+		this = value ? (this | CAPS_LOCK) : (this & 0xFFFFFFF - (1 << CAPS_LOCK));
+		return value;
+		
+	}
+	
+	
+	private function get_ctrlKey ():Bool {
+		
+		return (this & LEFT_CTRL > 0) || (this & RIGHT_CTRL > 0);
+		
+	}
+	
+	
+	private inline function set_ctrlKey (value:Bool):Bool {
+		
+		this = value ? (this | CTRL) : (this & 0xFFFFFFF - (1 << CTRL));
+		return value;
+		
+	}
+	
+	
+	private function get_metaKey ():Bool {
+		
+		return (this & LEFT_META > 0) || (this & RIGHT_META > 0);
+		
+	}
+	
+	
+	private inline function set_metaKey (value:Bool):Bool {
+		
+		this = value ? (this | META) : (this & 0xFFFFFFF - (1 << META));
+		return value;
+		
+	}
+	
+	
+	private function get_numLock ():Bool {
+		
+		return (this & NUM_LOCK > 0) || (this & NUM_LOCK > 0);
+		
+	}
+	
+	
+	private inline function set_numLock (value:Bool):Bool {
+		
+		this = value ? (this | NUM_LOCK) : (this & 0xFFFFFFF - (1 << NUM_LOCK));
+		return value;
+		
+	}
+	
+	
+	private function get_shiftKey ():Bool {
+		
+		return (this & LEFT_SHIFT > 0) || (this & RIGHT_SHIFT > 0);
+		
+	}
+	
+	
+	private inline function set_shiftKey (value:Bool):Bool {
+		
+		this = value ? (this | SHIFT) : (this & 0xFFFFFFF - (1 << SHIFT));
+		return value;
+		
+	}
+	
+	
+}
\ No newline at end of file