Examples: Fixed filter handling.

Author: mrdoob

examples/index.html

@@ -316,6 +316,13 @@ <h1><a href="http://threejs.org">three.js</a></h1>
 		}
 
 		filterInput.value = extractQuery();
+
+		if ( filterInput.value !== '' ) {
+
+			panel.classList.add( 'searchFocused' );
+
+		}
+
 		updateFilter();
 
 		</script>