完成大作业服务端代码，新建管理端，管理端不可用

Project/Service/static/js/index.js

@@ -0,0 +1,29 @@
+function openTab(evt, tabName) {
+    var i, tabcontent, tablinks;
+    tabcontent = document.getElementsByClassName("tabcontent");
+    for (i = 0; i < tabcontent.length; i++) {
+        tabcontent[i].style.display = "none";
+    }
+    tablinks = document.getElementsByClassName("tablinks");
+    for (i = 0; i < tablinks.length; i++) {
+        tablinks[i].className = tablinks[i].className.replace(" active", "");
+    }
+    document.getElementById(tabName).style.display = "block";
+    evt.currentTarget.className += " active";
+}
+
+function increment() {
+    var passengers = document.getElementById("passengers");
+    var value = parseInt(passengers.value, 10);
+    if (value < 50) {
+        passengers.value = value + 1;
+    }
+}
+
+function decrement() {
+    var passengers = document.getElementById("passengers");
+    var value = parseInt(passengers.value, 10);
+    if (value > 1) {
+        passengers.value = value - 1;
+    }
+}