このエラーメッセージに関する原因と対処に関して説明します。
エラーメッセージ(英語)：
does not support associative arrays
対処
関連リンク
Javascript Does Not Support Associative Arrays... - Dynamic Drivewww.dynamicdrive.com > ... > JavaScript
http://www.dynamicdrive.com/forums/showthread.php?34796-Javascript-Does-Not-Support-Associative-Arra・・・
Are associative arrays supported in Javascript? - Stack Overflowstackoverflow.com/.../are-associative-arrays-supported-i...
https://stackoverflow.com/questions/33208130/are-associative-arrays-supported-in-javascript
How do I access the first key of an 'associative ...
https://stackoverflow.com/questions/4491272/how-do-i-access-the-first-key-of-an-associative-array-in・・・