fix bug of search

source/js/app.js

@@ -9,6 +9,11 @@ var customSearch;
 		const $elem = elem.href ? $(elem.getAttribute('href')) : $(elem);
 		$('html, body').animate({ 'scrollTop': $elem.offset().top - correction }, 400);
 	};
+  document.onkeydown = function() {
+    if (event.keyCode == 9) {
+      return false;
+    }
+  }
 
 	function setHeader() {
 		if (!window.subData) return;