如何使用PhoneGap读写内部数据库？

我有一个内部 SQLite DB"Assets"我在其中存储了 100 个用户名和相应密码的文件夹，我如何通过phoneGap 访问它？
我读过了

• http://docs.phonegap.com/en/1.6.1/cordova_storage_storage.md.html#Storage http://docs.phonegap.com/en/1.6.1/cordova_storage_storage.md.html#Storage

• 从android的phonegap html文件连接到sqlite数据库 https://stackoverflow.com/questions/9171662/connecting-to-sqlite-database-from-phonegap-html-file-for-android

• http://wiki.phonegap.com/w/page/16494756/Adding-SQL-Database-support-to-your-iPhone-App http://wiki.phonegap.com/w/page/16494756/Adding-SQL-Database-support-to-your-iPhone-App

  Am still not able to figure out How to connect to my internal DB which is already Created,
  dbname = userauth
  Tablename = reg
  parameters = usrnm , psw
  Any Answer is Highly Encouraged
  
  Am using this here.
  
  

/**
 * Creates / Opens a connection to DB
 */
DB.openDB = function() {
    try {
        if (!window.openDatabase) {
            //alert('Cannot open database!');
        } else {
            var shortName = 'db_name';
            var version = '1.0';
            var displayName = 'DBNAME';
            var maxSize = (DEVICE_TYPE == DEVICE_ANDROID || DEVICE_TYPE == DEVICE_ANDROID_TAB) ? 5242880 : 1000000; ////819200; //65536; // in bytes // increased to support Android//163840; // 
            this.vocabDB = window.openDatabase(shortName, version, displayName, maxSize, this.DBCreated);
            this.DBSupported = true;
        }
    } catch(e) {
        //console.log("DB Error handling code goes here.");
        //console.log(e);
        return;
    }
}