Simple DB interface for phonegap / sqlite for app SpeakEnglish

dbConfig.js

var SpeakEnglish = {
  db: {
		name: 'speakEnglishDB',
		displayName: 'Speak English DB',
		version: '1.0',
		size: 1000000,
		categories: {
			name: 'categories',
			columns: ['name']
		},
		
		sentences: {
			name: 'sentences',
			columns: ['name']
		},
		
		records: {
			name: 'records',
			columns: ['normCat', 'normSen', 'fileName']
		}
	}
};

function normalizeData(datas) {
	var normalizedDatas = [];
	for(var i in datas) {
		var data = datas[i];
		if (typeof data == "string") {
			data = "\'" + data + "\'";
		}
		normalizedDatas.push(data);
	}
	return normalizedDatas;
}

function isPhone() {
	return navigator.userAgent.match(/(iPhone|iPod|iPad|Android|BlackBerry)/);
};

SpeakEnglish.persistence = {
	db: null,
	initialize: function() {
		if (isPhone()) {
			this.db = window.openDatabase(SpeakEnglish.db.name, SpeakEnglish.db.version, SpeakEnglish.db.displayName, SpeakEnglish.db.size);
			this.createTable(SpeakEnglish.db.records.name, SpeakEnglish.db.records.columns);
		}
	},
	
	dropTable: function(table) {
		this.db.transaction(function(tx) {
			tx.executeSql(Mustache.render('DROP TABLE IF EXISTS {{table}}', {table: table}));
		}, this.errorCB, this.successCB);
	},

	createTable: function(table, columns) {
		this.db.transaction(function(tx) {
			var refs = {
				table: table,
				columns: columns.join(', ')
			};
			var sqlStr = Mustache.render('CREATE TABLE IF NOT EXISTS {{table}} ({{columns}})', refs);
		    tx.executeSql(sqlStr);
		}, this.errorCB, this.successCB);
	},
	
	deleteFromTable: function(query, dbCallback) {
		this.db.transaction(function(tx) {
			tx.executeSql(query, [], function() {
				dbCallback();
			}, SpeakEnglish.persistence.errorCB);
		}, this.errorCB, this.successCB);
	},
	
	insertRowIntoTable: function(table, columns, datas) {
		this.db.transaction(function(tx) {
			var refs = {
				table: table,
				columns: columns.join(', '),
				datas: normalizeData(datas).join(', ')
			};
			var sqlStr = Mustache.render('INSERT INTO {{table}} ({{columns}}) VALUES ({{{datas}}})', refs);
			console.log("Inserting data: " + sqlStr);
			tx.executeSql(sqlStr);
		}, this.errorCB, this.successCB);
	},

	errorCB: function(error) {
		console.error('Error processing SQL, code = ' + error.code + ', message = ' + error.message);
	},

	successCB: function() {
		console.log('Proccess SQL sucessfully');
	},
	
	queryTable: function(query, dbCallback) {
		if (isPhone())
		{
			this.db.transaction(function(tx) {
				tx.executeSql(query, [], function(tx1, results) {
					dbCallback(results);
				}, SpeakEnglish.persistence.errorCB);
			}, this.errorCB);
		}
	}
};