HTML中ID与Name的命名规范
http:///TR/html401/#type-cdata中的规范规定是如下:
ID and NAME tokens must begin with a letter ([A-Za-z]) and may be followed by any number of letters, digits ([0-9]), hyphens ("-"), underscores ("_"), colons (":"), and periods (".").
http:///TR/html401/#type-cdata中的规范规定是如下: