and right click. The first time the image will be blocked but don't be deterred. Right click it again and this time you'll be given an option to override the blocking. Override it and the third time you right click you'll be able to search on Tineye.

Note that you must do this 3-step sequence every time you look at a different page on Eros. They make it a pain.

If your using Firefox, you can open the Eros ad, click on the picture and drag it up to a new tab.
Then you can use the Tineye plug in to search the image. It will save you a few steps.
This will also give you the web address for the picture to.

Also you might want to use Google Image search to, I have found it very helpful.

On FF for Mac, I can drag from Eros, etc. to the dialog box on a separate tab where the Google Image search is waiting for it. Works like a charm.

That works very well too, how did you come upon that?

I  figured some of it out on my own, but someone told me about grabbing the picture and putting it in a new tab.

Glad it could help you.