我有一段用 Phonegap 编写的基本代码，它在 sql lite 表中插入值。但是，当我尝试按下此操作的按钮时，日志显示消息：“未捕获的 ReferenceError：dbb 未在文件中定义：///android_asset/www/index.html:116”。html文件中的所有代码是：
<!DOCTYPE HTML>
<html>
<head>
<meta name="viewport" content="width=default-width; user-scalable=no" />
<meta http-equiv="Content-type" content="text/html;charset=utf-8">
<title>Embedded Sql Example</title>
<script type="text/javascript" charset="utf-8" src="cordova-2.2.0.js"></script>
<script type="text/javascript" charset="utf-8" src="js/jquery-1.8.2.js"></script>
<!-- main scripts used in this example -->
<script type="text/javascript" charset="utf-8">
var db;
var shortName = 'WebSqlDB';
var version = '1.0';
var displayName = 'WebSqlDB';
var maxSize = 65535;
function errorHandler(transaction, error) {
alert('Error: ' + error.message + ' code: ' + error.code);
}
function successCallBack() {
alert("DEBUGGING: success");
}
function nullHandler(){};
function onBodyLoad(){
alert("DEBUGGING: we are in the onBodyLoad() function");
if (!window.openDatabase) {
alert('Databases are not supported in this browser.');
return;
}
db = openDatabase(shortName, version, displayName,maxSize);
db.transaction(function(tx){
// you can uncomment this next line if you want the User table to be empty each time the application runs
// tx.executeSql( 'DROP TABLE User',nullHandler,nullHandler);
tx.executeSql( 'CREATE TABLE IF NOT EXISTS User(UserId INTEGER NOT NULL PRIMARY KEY, FirstName TEXT NOT NULL, LastName TEXT NOT NULL)', [],nullHandler,errorHandler);
},errorHandler,successCallBack);
}
function ListDBValues() {
if (!window.openDatabase) {
alert('Databases are not supported in this browser.');
return;
}
$('#lbUsers').html('');
db.transaction(function(transaction) {
transaction.executeSql('SELECT * FROM User;', [],
function(transaction, result) {
if (result != null && result.rows != null) {
for (var i = 0; i < result.rows.length; i++) {
var row = result.rows.item(i);
$('#lbUsers').append('<br>' + row.UserId + '. ' +
row.FirstName+ ' ' + row.LastName);
}
}
},errorHandler);
},errorHandler,nullHandler);
return;
}
function AddValueToDB() {
if (!window.openDatabase) {
alert('Databases are not supported in this browser.');
return;
}
db.transaction(function(transaction) {
transaction.executeSql('INSERT INTO User(FirstName, LastName) VALUES (?,?)',[$('#txFirstName').val(), $('#txLastName').val()], nullHandler,errorHandler);
});
ListDBValues();
return false;
}
</script>
</head>
<body onload="onBodyLoad();">
<h1>WebSQL</h1>
<input id="txFirstName" type="text" placeholder="FirstName">
<input id="txLastName" type="text" placeholder="Last Name">
<input type="button" value="Add record" onClick="AddValueToDB();">
<input type="button" value="Refresh" onClick="ListDBValues();"> <br>
<br>
<span style="font-weight:bold;">Currently stored values:</span>
<span id="lbUsers"></span>
</body>
</html>
任何帮助，将不胜感激。