when variable "tinymce" is not available, it will cause other plugins that is running javascript not working

[simongcc]

Symptoms:

Some plugins running Javacript will be broken due to undefined variable is being detected in Attachment Javascript in upload.php (or any other screen with the same situation)

Step to Reproduce:

Suppose attachment 3.5.3 is installed and activated already

1. Download the plugins "manual image crop", install and activate it
2. Go to Media -> click "Crop" link under image thumbnail(must have to test)
3. The JCrop will not work and handle will not be shown because Javacript is broken
   at "undefined tinyMCE variable" according to trace console in Chrome

   Solution:

in class.field.wysiwyg.php, line 82 add a conditional test to avoid undefined tinyMCE variable break the Javascript when it is not available.

if(typeof tinyMCE !== 'undefined'){
...original code
}

Hope this can help those with the same problem and improve the Attachment.

[w3b-beweb]

thanks, I was having the same problem with Attachments+Ag Custom Admin. Your fix works great.