Update head.html

docs/_includes/head.html

@@ -33,7 +33,7 @@
 				currentLang = navigator.browserLanguage;
 			}
 			
-			if(currentLang.substr(1,2).toLowerCase()=="zh"){
+			if(currentLang.substr(0,2).toLowerCase()=="zh"){
 				document.getElementById("maxkey_title").innerHTML="MaxKey-业界领先的企业级IAM身份管理和身份认证产品";
 			}
 		</script>