Trying to script a click in a Web Viewer or Web Page

Filemaker 13 Pro Advanced. Mac Yosemite.

I'm pulling my hair out - maybe somebody can offer a suggestion before there is no more hair left.

I can't for the life of me figure out how to script a click in a web page or a web viewer. I have tried all of the following:

• Opening a web page outside of FM (in Safari) and trying to click in that window via:
     - AppleScript from w/i FM (get an Assistive Access error, even though I've allowed FM in Privacy & Security settings
     - Opening an Automator-created application via Send Event (can't choose the application)

• Opening the same page in a Web Viewer and trying to click via the same methods above. Same problems.

I've also searched the web for a couple days and haven't found anything that I can understand yet.

A few questions:
• Is there a standard, consistently-works method for scripting a click somewhere on the screen? (I can provide exact coordinates)
• Why do I keep getting Assistive Access problems even after I've allowed FM (and Automator) Assistive Access?
• There MUST be someway to launch an Automator application from FM - how do I get Send Event to work?

Thanks in advance for any help!!

Edited October 14, 201510 yr by owangolama