I just cleared all the temporary internet files & now notice this
In the lower left corner of my Yahoo home page ----- ---- ( read us.js2.yimg.com. )
Can anyone tell me what it is & how to get rid of it ?

If I'm reading you correctly, this appears in the lower left of your web browser when on Yahoo page.

OK this relates to Yahoo Image Search (http://search.yahoo.com/images) and is nothing to be concerned about.