Scripting Based on Layer Order, Not Layer Name

[pkgraham]

I have a situation where I have over 900 images, each with a specific layer (fortunately the top layer) that needs to change color. I need to know if it is possible to develop a script that will recognize the layer by its order, not by the name of the layer, because all the names are different. Other than the layer name issue, these files have different numbers of layers as well.

So, my script needs to recognize the top layer, not based on the name, but the order, then change the color of that layer. These layers are all text.

Thanks in advance,

Paul