Chrome userscript error: “Unsafe JavaScript attempt to access frame”

Question

// the iframe of the div I need to access
var iframe = document.getElementsByTagName(\"iframe\")[2];
var innerDoc = iframe.contentDocument || iframe.contentWindow.do         


        

Answer 1

For security reasons your browser won't allow you to access javascript in an iframe from another domain.

See the top answer here:

jQuery cross domain iframe scripting