PhoneGap 在首页 点返回键时 确认退出应用 其他时候还是返回

document.addEventListener("deviceready", onDeviceReady, false); // PhoneGap is loaded and it is now safe to make calls PhoneGap methodsfunction onDeviceReady() {  // 注册回退按钮事件监听器  document.addEventListener("backbutton", onBackKeyDown, false); //返回键} function onBackKeyDown() {//alert(window.location.href);if(window.location.href=="file:///android_asset/www/index.html#home"||window.location.href=="file:///android_asset/www/index.html"){navigator.notification.confirm('确定要退出程序吗?',  // messageonConfirm,              // callback to invoke with index of button pressed'提示',            // title'确定,取消'          // buttonLabels);}else{history.go(-1);} } function onConfirm(button) {if(button==1) navigator.app.exitApp(); //选择了确定才执行退出}