diff --git a/src/jquery.uls.core.js b/src/jquery.uls.core.js
index 17d9797..a89339a 100644
--- a/src/jquery.uls.core.js
+++ b/src/jquery.uls.core.js
@@ -215,7 +215,7 @@
 			// Handle key press events on the menu
 			that.$menu.on('keypress', $.proxy(this.keypress, this) )
 				.on('keyup', $.proxy(this.keyup, this) );
-			if ( $.browser.webkit || $.browser.msie ) {
+			if ( this.eventSupported( 'keydown' ) ) {
 				this.$menu.on( 'keydown', $.proxy( this.keypress, this ) );
 			}
 
@@ -301,8 +301,17 @@
 			if ( !this.shown ) {
 				this.show();
 			}
-		}
+		},
 
+		eventSupported: function ( eventName ) {
+			var isSupported = eventName in this.$menu;
+
+			if ( !isSupported ) {
+				this.$element.setAttribute( eventName, 'return;' );
+				isSupported = typeof this.$element[eventName] === 'function';
+			}
+			return isSupported;
+		}
 	};
 
 	/* ULS PLUGIN DEFINITION
diff --git a/src/jquery.uls.languagefilter.js b/src/jquery.uls.languagefilter.js
index 293cd1f..b72b237 100644
--- a/src/jquery.uls.languagefilter.js
+++ b/src/jquery.uls.languagefilter.js
@@ -50,7 +50,7 @@
 		listen: function() {
 			this.$element.on( 'keypress', $.proxy( this.keyup, this ) )
 				.on( 'keyup', $.proxy( this.keyup, this ) );
-			if ( $.browser.webkit || $.browser.msie ) {
+			if ( this.eventSupported( 'keydown' ) ) {
 				this.$element.on( 'keydown', $.proxy( this.keyup, this ) );
 			}
 			if ( this.$clear.length ) {
@@ -250,6 +250,17 @@
 				matcher.test( $.uls.data.getAutonym( langCode ) ) ||
 				matcher.test( langCode ) ||
 				matcher.test( $.uls.data.getScript( langCode ) );
+		},
+
+		eventSupported: function ( eventName ) {
+			var isSupported = eventName in this.$element;
+
+			if ( !isSupported ) {
+				this.$element.setAttribute( eventName, 'return;' );
+				isSupported = typeof this.$element[eventName] === 'function';
+			}
+
+			return isSupported;
 		}
 
 	};