扩展ThePhantomUpvoter的评论 - 它回答了问题 - 但主要是从未答复的列表中删除它：

更改：

 x.executeSql（'  CREATE TABLE IF NOT NOT EXISTS'  + CASENAME '  +（id INTEGER PRIMARY KEY AUTOINCREMENT，DocumentName TEXT NOT NULL，DocumentDate INTEGER，DocumentNotes TEXT NOT NOT NULL）'）; 

To：

 x.executeSql（'  CREATE TABLE IF NOT NOT EXISTS' + CASEN AME + ' （id INTEGER PRIMARY KEY AUTOINCREMENT，DocumentName TEXT NOT NULL，DocumentDate INTEGER，DocumentNotes TEXT NOT NULL）'）; 

Hi
i am getting error

tx.executeSql('CREATE TABLE IF NOT EXISTS '+CASENAME'+(id INTEGER PRIMARY KEY AUTOINCREMENT, DocumentName TEXT NOT NULL,DocumentDate INTEGER ,DocumentNotes TEXT NOT NULL)');

Error:
Unexpected string

To expand on ThePhantomUpvoter's comment - which answers the question - but mostly to remove this from the unanswered list:
Change:

x.executeSql('CREATE TABLE IF NOT EXISTS '+CASENAME'+(id INTEGER PRIMARY KEY AUTOINCREMENT, DocumentName TEXT NOT NULL,DocumentDate INTEGER ,DocumentNotes TEXT NOT NULL)');

To:

x.executeSql('CREATE TABLE IF NOT EXISTS '+CASENAME+'(id INTEGER PRIMARY KEY AUTOINCREMENT, DocumentName TEXT NOT NULL,DocumentDate INTEGER ,DocumentNotes TEXT NOT NULL)');