Mechanical Turk HIT without Fields

I am trying to create a HIT where the worker presses a key in response to images being displayed. The goal of the HIT is to have many workers perform the same identifications in a random order. For example, worker 1 sees the images in order 1, 2, 3, 4, while worker 2 sees the images in the order 3, 1, 4, 2. Because the response time is essential, the images are displayed one-at-a-time. The worker sees image 1, responds, and then image 1 is replaced with image 2, etc..

I am not clear on what is the best method for doing this and recording the response times. Currently, my plan is to create an text box for each image to be displayed and storing the response time for that image in its corresponding field. So the amount of time to respond to image 1 would be recorded in "TextBox1", the amount of time to respond to image 2 would be recorded in "TextBox2", and so on.

Is there a better way to do this? For example, is there a way to retrieve the console log from the worker? That would allow me to write the data to the console and not require additional objects on the page.