Response time - delaying the onset of recording - by: sheffieldthesismaps

Hello!

I'm using LimeSurvey to conduct a user study, part of which involves the use of some interactive web applications, for displaying 3D maps. These are embedded into limesurvey using an iframe. An example can be seen here: arcg.is/2mLRS5X

Participants must then answer some questions about the 3D map. I'm interested in response time, which LimeSurvey usefully records. However, the web application itself takes time to load and initiate - generally 30-40 seconds. As such, the response time recorded by lime survey is always in the region of 30-40 seconds out of step.

• Is there a way to delay the onset of the the response time measurement, until after the web application has fully loaded?
• Alternatively... the application records and displays the loading time, in the format "Data loaded in XX settings", when 'Details' is clicked on the loading screen. Might there be a way to extract the number of seconds here, and automatically subtract it from the response time for the question?

Any ideas? I guess this might be possible with javascript somehow, but I'm totally stuck!

Thanks!